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Episode number: 4x20 Production Number: 3T7520 Airdate: Thursday April 30th, 2009 Alternate Airdates:
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| • Creator | Eric Kripke |
| • Executive Producer | Kim Manners  | Robert Singer (1)  | Eric Kripke  | McG |
| • Co-Executive Producer | Ben Edlund  | Philip Sgriccia  | Peter Johnson |
| • Supervising Producer | Sera Gamble |
| • Producer | Vladimir Stefoff  | Todd Philip Aronauer |
| • Co-Producer | Jerry Wanek  | Serge LaDouceur |
| • Associate Producer | Kristin Cronin |
| • Production Designer | John Marcynuk |
| • Editor | Anthony Pinker |
| • Casting | Eric Dawson  | Carol Kritzer  | Robert J. Ulrich  | Heike Brandstatter  | Coreen Mayrs |
| • First Assistant Director | John MacCarthy |
| • Second Assistant Director | Adrian Diepold |
| • Music | Jay Gruska |
| • Music Supervisor | Alexandra Patsavas |
| • Costume Designer | Diane Widas |
| • Set Decorator | George Neuman |
| • Property Master | Christopher Cooper |
| • Script Supervisor | Patti Henderson |
| • Supervising Sound Editor | Charlie Crutcher |
| • 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 |
| • 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 |