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 |
| Editing | Peter Oliver | Editor |
| Camera | Richard Mott | Director of Photography |
| Art | Iain McDonald | Production Design |
| Art | Suzanne Field | Art Direction |
| Costume & Make-Up | Julie Dorrat-Keenan | Makeup Supervisor |
| Costume & Make-Up | Jacqui Mallett | Makeup Department Head |
| Costume & Make-Up | Jacqui Mallett | Makeup Designer |
| Sound | Gwilym Perry | Foley Editor |
| Visual Effects | Tim Zaccheo | Visual Effects Supervisor |
| Camera | Alan Maxwell | Camera Operator |
| Camera | Martin Newstead | Steadicam Operator |
| Lighting | Dave Thom | Gaffer |
| Lighting | Conor Mackenzie | Lighting Technician |
| Costume & Make-Up | Cathy Prior | Costume Supervisor |
| Editing | Amy Swan | Assistant Editor |
| Sound | Matt Biffa | Music Supervisor |
| Directing | Lucy Enfield | Script Supervisor |
| Production | Francesca Falchi-Pereira | Production Coordinator |
| Crew | Karie-Ann Robinson | Chaperone |
| Crew | Andy Merchant | Stunts |
| Crew | Chris Pollard | Stunts |
