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Episode number: 4x21 Production Number: 3T7521 Airdate: Thursday May 07th, 2009 Alternate Airdates:
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| • Creator | Eric Kripke |
| • Executive Producer | McG  | Eric Kripke  | Robert Singer (1)  | Kim Manners |
| • Co-Executive Producer | Peter Johnson  | Philip Sgriccia  | Ben Edlund |
| • Supervising Producer | Sera Gamble |
| • Producer | Todd Philip Aronauer  | Vladimir Stefoff |
| • Co-Producer | Jerry Wanek  | Serge LaDouceur |
| • Associate Producer | Kristin Cronin |
| • Production Designer | John Marcynuk |
| • Editor | Nicole Baer |
| • Casting | Eric Dawson  | Robert J. Ulrich  | Carol Kritzer  | Heike Brandstatter  | Coreen Mayrs |
| • First Assistant Director | Kevin Parks |
| • Second Assistant Director | Amanda Bartley |
| • Music | Jay Gruska |
| • Music Editor | Dino Moriana |
| • Music Supervisor | Alexandra Patsavas |
| • Costume Designer | Diane Widas |
| • Set Decorator | George Neuman |
| • Property Master | Christopher Cooper |
| • Script Supervisor | Tammy Bentz |
| • Re-Recording Mixer | Bill Jackson (1)  | Dennis Kirk |
| • Director of Photography | Serge LaDouceur |
| • Stunt Coordinator | Lou Bollo |
| • Production Manager | Todd Pittson |
| • Sound Mixer | Donald Painchaud |
| • Executive Story Editor | Jeremy Carver  | Julie Siege  | Cathryn Humphris |
| • Key Makeup Artist | Shannon Coppin |
| • Visual Effects Supervisor | Ivan Hayden |
| • Visual Effects Producer | Grant Lindsay |
| • Key Hairstylist | Jeannie Chow |
| • Special Effects Supervisor | Randy Shymkiw |
| • Original Casting | Patrick Rush |