| Andy Samberg | Jake Peralta |
| Stephanie Beatriz | Rosa Diaz |
| Terry Crews | Terry Jeffords |
| Melissa Fumero | Amy Santiago |
| Joe Lo Truglio | Charles Boyle |
| Chelsea Peretti | Gina Linetti |
| Andre Braugher | Raymond Holt |
| Dirk Blocker | Hitchcock |
| Joel McKinnon Miller | Scully |
| Merrin Dungey | Sharon Jeffords |
| Jess Allen | Delivery Guy |
| Mark Berry | Deputy Chief Gerber |
| Mel Cowan | Doctor Nash |
| Matthew Harris | Perp
(as Matthew Isaac Harris) |
| Armand Vasquez | Photographer |
| West Los Angeles Children's Choir | Themselves |
| Kirk Bovill | Phil Haimes
(uncredited) |
| Peter Janov | Police Officer
(uncredited) |
| Daniel Moncada | Perp #2
(uncredited) |
| Finn Snyder | Children's Choir Member
(uncredited) |
| Andrew James Steele | Choir Boy #2
(uncredited) |