 | Mike Rowe | ... | Himself - Host / ... (112 episodes, 2005-2009) |
 | David M. Barsky | ... | Himself (37 episodes, 2005-2009) |
 | Doug Glover | ... | Himself (23 episodes, 2005-2009) |
 | Troy Paff | ... | Himself (21 episodes, 2005-2009) |

| Chris Whiteneck | ... | Himself (9 episodes, 2006-2008) |
 | Adam Bradley | ... | Himself (7 episodes, 2006-2007) |
 | Christopher Jones | ... | Himself (7 episodes, 2007-2009) |
 | Edward Barbini | ... | Himself (4 episodes, 2007-2009) |
 | Bill Bretherton | ... | Himself (4 episodes, 2005-2007) |
 | Rhea Meyers | ... | Herself (2 episodes, 2005-2006) |
 | Craig Piligian | ... | Himself (2 episodes, 2007-2009) |
 | Lawrence Jackson III | ... | Himself (2 episodes, 2005-2009) |
 | Mary Bretherton | ... | Herself (2 episodes, 2005-2007) |
 | Floyd Guillory | ... | Himself (2 episodes, 2005-2007) |
 | Wayne Magwood | ... | Himself (2 episodes, 2005-2007) |
 | Kirt Struemph | ... | Himself (2 episodes, 2005-2007) |
 | Bessie Evans | ... | Herself (2 episodes, 2006-2007) |
 | Dawn Magowan | ... | Herself (2 episodes, 2006-2007) |
 | Gerry Savoie | ... | Himself (2 episodes, 2006-2007) |
 | Ami Sinay | ... | Himself (2 episodes, 2006-2007) |
 | Yahav Sinay | ... | Himself (2 episodes, 2006-2007) |
 | Kristin Stanford | ... | Herself (2 episodes, 2006-2007) |

| Jeremiah S. Sullivan | ... | Himself (2 episodes, 2006-2007) |
 | Randy Ashman | ... | Himself (2 episodes, 2007-2008) |
 | Jesse Meyer | ... | Himself (2 episodes, 2007-2008) |
 | George Walters | ... | Himself (2 episodes, 2007-2008) |
 | Walt Burling | ... | Himself (2 episodes, 2007) |
 | Dara Trager | ... | Herself (2 episodes, 2007) |
 | Eric Trager | ... | Himself (2 episodes, 2007) |
 | Doug Wolven | ... | Himself (2 episodes, 2007) |
 | Dr. Charlene Esch | ... | Herself (2 episodes, 2008) |
|
| Edward Barbini | .... | executive producer (110 episodes, 2005-2009) |
| David M. Barsky | .... | field producer / producer / ... (110 episodes, 2005-2009) |
| Craig Piligian | .... | executive producer (110 episodes, 2005-2009) |
| Mike Rowe | .... | co-producer / producer / ... (110 episodes, 2005-2009) |
| Edward Rohwedder | .... | supervising producer (98 episodes, 2005-2009) |
| Michel Patzer | .... | story producer / segment producer (79 episodes, 2005-2009) |
| Heath Banks | .... | producer / line producer (77 episodes, 2005-2008) |
| Jared Bushansky | .... | post producer (73 episodes, 2005-2008) |
| Mary Bess Walker | .... | story producer / segment producer (65 episodes, 2005-2009) |
| Jennifer Bastable | .... | associate producer (52 episodes, 2005-2009) |
| Gena McCarthy | .... | executive producer: Discovery Channel (52 episodes, 2005-2009) |
| Dayna McTavish | .... | associate producer (33 episodes, 2007-2008) |
| Brett Boydstun | .... | line producer (32 episodes, 2005-2007) |
| Mary Donahue | .... | executive producer: Discovery Channel / (for Discovery Channel / ... (30 episodes, 2007-2008) |
| Cynthia Tan | .... | associate producer: Discovery Channel (28 episodes, 2005-2007) |
| Leigh Purinton | .... | producer (28 episodes, 2008-2009) |
| Suzy Geller-Wolf | .... | executive producer: Discovery Channel / (executive producer for Discovery Channel (22 episodes, 2006-2007) |
| Kristine Raia | .... | associate producer (21 episodes, 2008-2009) |
| April Marie Broyles | .... | associate producer: Discovery Channel / associate producer (16 episodes, 2005-2007) |
| Scott Popjes | .... | supervising producer (16 episodes, 2008-2009) |
| Mary Stephens | .... | coordinating producer: Discovery Channel (15 episodes, 2008-2009) |
| Melanie Alessa | .... | story producer (13 episodes, 2005-2006) |
| Meagan Davis | .... | coordinating producer: Discovery Channel (13 episodes, 2008-2009) |
| Kathleen Hunkele | .... | associate producer: Discovery Channel / (associate producer for Discovery Channel / ... (12 episodes, 2006-2007) |
| Kenitra Ford | .... | producer: Discovery Channel / producer (11 episodes, 2008) |
| Eric Mazer | .... | field producer (10 episodes, 2005) |
| John Scott III | .... | producer / line producer (10 episodes, 2008-2009) |
| Ira Leonard | .... | story producer (10 episodes, 2009) |
| Greg Tillman | .... | field producer (8 episodes, 2006-2007) |
| Tara Hunter | .... | (for Discovery Channel (7 episodes, 2007-2008) |
| Margit Ritz | .... | story producer (6 episodes, 2007-2008) |
| Ellen Lichtenstein | .... | producer: Discovery Channel (5 episodes, 2008-2009) |
| Jonathan Bourne | .... | producer (4 episodes, 2005-2006) |
| Tim Pastore | .... | executive producer: Discovery Channel (4 episodes, 2009) |
| Amanda Ross | .... | associate producer (3 episodes, 2008) |
| Tessa Treadway | .... | post producer (3 episodes, 2008) |
| Meghan Brennen | .... | story producer (3 episodes, 2009) |
| Amber Mike | .... | associate producer (2 episodes, 2008-2009) |
| |
|
| Nick Pierone | .... | sound post-production / sound re-recording mixer / ... (85 episodes, 2005-2009) |
| Christopher Jones | .... | sound (52 episodes, 2007-2009) |
| Chris Whiteneck | .... | sound mixer / audio (43 episodes, 2005-2009) |
| Justin Wikke | .... | dialogue editor / prelay audio (42 episodes, 2008-2009) |
| Rhea Meyers | .... | sound mixer / sound (18 episodes, 2005-2007) |
| Danika Benton | .... | dialogue editor / prelay audio / ... (18 episodes, 2008-2009) |
| Ed Thacker | .... | sound re-recording mixer (13 episodes, 2008-2009) |
| Kristine Raia | .... | tape operator (11 episodes, 2008-2009) |
| Monroe Cummings | .... | sound (9 episodes, 2007-2008) |
| Paul S. Shapiro | .... | sound mixer / audio (9 episodes, 2007-2008) |
| Cyril Plouviez | .... | sound mixer (8 episodes, 2005) |
| Jorge Montijo | .... | sound re-recording mixer (7 episodes, 2008-2009) |
| Stanley Kastner | .... | post-production sound / sound re-recording mixer (6 episodes, 2005-2006) |
| Shawn Loesser | .... | sound (3 episodes, 2007-2008) |
| Decker Watson | .... | sound supervisor (2 episodes, 2007) |
| Justin Harvey | .... | sound (2 episodes, 2008) |
| |
|
| Jonathan Montemayor | .... | finishing editor: HD / assistant editor / ... (77 episodes, 2005-2009) |
| John Gehrke | .... | assistant editor (53 episodes, 2007-2009) |
| Rod Decker | .... | on-line editor / finishing editor: HD (44 episodes, 2005-2009) |
| Miguel Camargo | .... | finishing editor: HD / on-line editor (40 episodes, 2007-2009) |
| Brittany Sheetz | .... | assistant editor (37 episodes, 2007-2009) |
| Claudia Chandler | .... | assistant editor (32 episodes, 2005-2006) |
| Jeff Seidman | .... | assistant editor (28 episodes, 2008-2009) |
| Aleks Dankers | .... | assistant editor (25 episodes, 2008-2009) |
| Joel Salazar | .... | on-line editor (22 episodes, 2005-2006) |
| Paul Le | .... | assistant editor (21 episodes, 2006-2007) |
| Alan R. Baxter | .... | assistant editor (12 episodes, 2006-2007) |
| David Broadbent | .... | on-line editor (10 episodes, 2005-2007) |
| Hannah Smith | .... | assistant editor (10 episodes, 2007) |
| Karen Rasch | .... | assistant editor (9 episodes, 2005-2007) |
| Jason Le | .... | assistant editor (8 episodes, 2006-2007) |
| Cameron Soper | .... | assistant editor (8 episodes, 2007-2008) |
| Rob Kraut | .... | assistant editor (8 episodes, 2008-2009) |
| Doug Mendoza | .... | post-production coordinator (7 episodes, 2006-2007) |
| Dana Sullivan | .... | assistant editor (6 episodes, 2005-2006) |
| Tracy Brimner | .... | post-production coordinator (6 episodes, 2005) |
| David Pleasant | .... | finishing editor: HD / on-line editor (6 episodes, 2007-2008) |
| Chris Rhodes | .... | assistant editor (5 episodes, 2009) |
| Jeremy Segal | .... | assistant editor (4 episodes, 2008) |
| Gerrad A. Holtz | .... | finishing editor: HD / on-line editor (3 episodes, 2005-2008) |
| Daniel Warner | .... | on-line editor (3 episodes, 2006) |
| Anthony J. Camaioni | .... | assistant editor (3 episodes, 2007-2008) |
| Jared Bushansky | .... | director of post-production (3 episodes, 2008) |
| Andrew Zoeller | .... | on-line editor (2 episodes, 2005) |
| Terence Curren | .... | on-line editor (2 episodes, 2006-2007) |
| |
|
| Karin Murphey | .... | assistant accountant (109 episodes, 2005-2009) |
| Colleen Kelly | .... | production coordinator (85 episodes, 2005-2009) |
| Jeff Thieme | .... | assistant to producers / executive coordinator (74 episodes, 2005-2008) |
| Susan Pieroni | .... | assistant to producers / production office coordinator / ... (73 episodes, 2005-2008) |
| Mike Rowe | .... | original concept by (64 episodes, 2007-2009) |
| Adam Bradley | .... | field coordinator (61 episodes, 2005-2009) |
| Jessica Smith | .... | assistant to producers / executive coordinator (61 episodes, 2005-2008) |
| Lauren Hoban | .... | assistant to producer / production office coordinator (59 episodes, 2007-2009) |
| Evan Clementin | .... | director of operations / operations manager (48 episodes, 2005-2007) |
| Chaz Morgan | .... | production office coordinator (39 episodes, 2005-2009) |
| John Gehrke | .... | production assistant (33 episodes, 2005-2007) |
| Ira Leonard | .... | field coordinator / production assistant (33 episodes, 2007-2009) |
| Brett Boydstun | .... | vice president: finance & operations (33 episodes, 2008-2009) |
| Mike Machin | .... | titles (32 episodes, 2005-2006) |
| Benito Ornelas | .... | production assistant (31 episodes, 2008-2009) |
| Michel Patzer | .... | segment producer (31 episodes, 2008-2009) |
| Kathleen Burns Rohr | .... | vice president of production (26 episodes, 2006-2007) |
| Cynthia Garcia | .... | production coordinator (25 episodes, 2008-2009) |
| Saralyn Wilhelmi | .... | researcher (24 episodes, 2008-2009) |
| Tom Kauffman | .... | production assistant (23 episodes, 2008-2009) |
| Greg Hairfield | .... | production coordinator / production office coordinator (22 episodes, 2006-2008) |
| Sarah King | .... | production coordinator (22 episodes, 2007-2008) |
| Earvin Piega | .... | production assistant / post production coordinator (22 episodes, 2008-2009) |
| Kim Kroonenburg | .... | executive coordinator (21 episodes, 2007-2009) |
| Meagan Davis | .... | senior production coordinator: Discovery Channel (20 episodes, 2008-2009) |
| Don Piega | .... | production assistant (20 episodes, 2008-2009) |
| Randa Cardwell | .... | segment producer (19 episodes, 2008-2009) |
| Erin Weller | .... | field coordinator (18 episodes, 2007-2009) |
| James Vasquez | .... | production assistant (18 episodes, 2008-2009) |
| Matthew Devahl | .... | production office coordinator (17 episodes, 2008-2009) |
| Ryan Walsh | .... | production assistant (16 episodes, 2008-2009) |
| Margit Ritz | .... | segment producer (15 episodes, 2008) |
| Will Hathaway | .... | production assistant / field coordinator (14 episodes, 2005-2006) |
| Stephanie Bowen | .... | production assistant (13 episodes, 2008-2009) |
| Rosie Charbonneau | .... | executive coordinator (13 episodes, 2008-2009) |
| Cameron Tang | .... | production assistant (13 episodes, 2008-2009) |
| Doug Staffield | .... | production assistant (13 episodes, 2008) |
| Nikki Hedlund | .... | segment producer (12 episodes, 2008-2009) |
| Lauren Macmillan | .... | assistant to producers (12 episodes, 2008-2009) |
| India Love | .... | finance manager (11 episodes, 2006-2007) |
| Greg Brandon | .... | field coordinator (11 episodes, 2008-2009) |
| Johnny Gould | .... | vice president programming and business development (11 episodes, 2009) |
| Stephenie Hill | .... | senior production coordinator: Discovery / senior production coordinator (11 episodes, 2009) |
| Gretchen Stockdale | .... | vice president and general counsel / vice president and General Counsel (11 episodes, 2009) |
| Crystal Harrell | .... | clearance coordinator (10 episodes, 2005) |
| Spencer Rosenberg | .... | director of operations (10 episodes, 2005) |
| Peter Welsh | .... | operations manager (10 episodes, 2006) |
| Jeremy Jones | .... | production assistant (10 episodes, 2007-2008) |
| Victoria Kelso | .... | accounting clerk (8 episodes, 2005) |
| Aaron Fitzgerald | .... | aerial coordinator (8 episodes, 2008-2009) |
| Aurore Barry | .... | production assistant (8 episodes, 2008) |
| Aleks Dankers | .... | production assistant (7 episodes, 2008) |
| Joey Scott | .... | production assistant (6 episodes, 2007-2008) |
| Jack Mendoza | .... | production coordinator (6 episodes, 2007) |
| Jacob Shelton | .... | production assistant (6 episodes, 2008) |
| Kathleen Clifford | .... | production assistant (5 episodes, 2009) |
| Meghan Brennan | .... | segment producer (4 episodes, 2009) |
| Gena McCarthy | .... | svp of production and development: Discovery Channel (4 episodes, 2009) |
| Cooper Parsons | .... | production assistant (3 episodes, 2008) |
| Teresa Tubera | .... | segment producer (3 episodes, 2008) |
| Gabriel Rivera | .... | production assistant / assistant post coordinator (3 episodes, 2009) |
| Kim Daniels | .... | research assistant (2 episodes, 2006) |
| Krissy Wolff | .... | logger (2 episodes, 2007) |
| Majorie Lewis | .... | segment producer (2 episodes, 2008) |
| |