During the Battle of the Bulge, an anachronistic count shelters a ragtag squad of Americans in his isolated castle hoping they will defend it against the advancing Germans.
Unfortunately the movie Castle Keep is not yet available on HBO Max.
| Writing | Daniel Taradash | Screenplay |
| Writing | David Rayfiel | Screenplay |
| Directing | Sydney Pollack | Director |
| Production | John Calley | Producer |
| Production | Martin Ransohoff | Producer |
| Camera | Henri Decaë | Director of Photography |
| Production | Lynn Stalmaster | Casting |
| Sound | Michel Legrand | Music |
| Editing | Malcolm Cooke | Editor |
| Costume & Make-Up | Jacques Fonteray | Costume Design |
| Sound | Antoine Petitjean | Sound |
| Writing | William Eastlake | Novel |
| Production | Edward L. Rissien | Associate Producer |
| Directing | Marc Maurette | Assistant Director |
| Art | Charles Merangel | Set Dresser |
| Sound | Michel Legrand | Conductor |
| Art | Max Douy | Art Direction |
| Production | Ludmilla Goulian | Production Manager |
| Art | Jacques Douy | Art Direction |
| Directing | Ray Kellogg | Second Unit Director |
| Editing | Michèle Robert-Lauliac | Assistant Editor |
| Production | Suzanne Wiesenfeld | Unit Manager |
| Art | Mort Rabinowitz | Art Direction |
