In preparation for a shotgun wedding before the birth of Baby Guster, Shawn and Gus go rogue in an attempt to track down Selene’s estranged husband, as Lassiter grapples with the future of his career.
Unfortunately the movie Psych 3: This Is Gus is not yet available on HBO Max.
| Directing | Steve Franks | Director |
| Production | Dulé Hill | Executive Producer |
| Production | Chris Henze | Executive Producer |
| Crew | Owen Walstrom | Stunt Coordinator |
| Writing | Steve Franks | Characters |
| Production | Julie Ashton | Casting |
| Sound | Adam Cohen | Original Music Composer |
| Sound | John Robert Wood | Original Music Composer |
| Editing | David Crabtree | Editor |
| Art | David Willson | Production Design |
| Camera | Scott Williams | Director of Photography |
| Production | Michele Greco | Producer |
| Production | Janelle Reyes | Co-Producer |
| Costume & Make-Up | Michelle Hunter | Costume Design |
| Art | Peter Ochotta | Art Direction |
| Art | Brant Lindroos | Set Decoration |
| Art | Santino Barile | Property Master |
| Art | Ksenia Markova | Assistant Art Director |
| Art | Dan Lambert | Construction Coordinator |
| Camera | Harvey Fedor | Key Grip |
| Lighting | Scott Clark | Gaffer |
| Production | Ritch Renaud | Location Manager |
| Writing | James Roday Rodriguez | Writer |
| Writing | Steve Franks | Writer |
| Production | James Roday Rodriguez | Executive Producer |
| Production | Steve Franks | Executive Producer |
