Many years ago, Grandpa was a World War II flying ace, but sadly he is now suffering from Alzheimer's disease. When his family can no longer look after him, he is moved to Twilight Towers, an old people's home. It soon becomes clear that Miss Dandy is running Twilight Towers for her own ulterior motives, and it is up to Grandpa and grandson Jack to make a daring escape. Failure could have the direst of consequences, but success will give Grandpa a final chance to relive his past and take to the sky once again in his beloved Spitfire.
Unfortunately the movie Grandpa's Great Escape is not yet available on HBO Max.
| Writing | Kevin Cecil | Adaptation |
| Writing | David Walliams | Writer |
| Directing | Elliot Hegarty | Director |
| Writing | David Walliams | Original Story |
| Costume & Make-Up | Chris Lyons | Special Effects Makeup Artist |
| Lighting | Conor Mackenzie | Lighting Technician |
| Production | Francesca Falchi-Pereira | Production Coordinator |
| Editing | Amy Swan | Assistant Editor |
| Sound | Matt Biffa | Music Supervisor |
| Editing | Peter Oliver | Editor |
| Camera | Richard Mott | Director of Photography |
| Art | Suzanne Field | Art Direction |
| Costume & Make-Up | Jacqui Mallett | Makeup Department Head |
| Costume & Make-Up | Julie Dorrat-Keenan | Makeup Supervisor |
| Visual Effects | Tim Zaccheo | Visual Effects Supervisor |
| Camera | Alan Maxwell | Camera Operator |
| Directing | Lucy Enfield | Script Supervisor |
| Costume & Make-Up | Cathy Prior | Costume Supervisor |
| Art | Iain McDonald | Production Design |
| Costume & Make-Up | Jacqui Mallett | Makeup Designer |
| Sound | Gwilym Perry | Foley Editor |
| Camera | Martin Newstead | Steadicam Operator |
| Lighting | Dave Thom | Gaffer |
| Crew | Chris Pollard | Stunts |
| Crew | Karie-Ann Robinson | Chaperone |
| Crew | Andy Merchant | Stunts |
