"The Block House"
1973
Directed by Clive Rees

Peter Sellers plays a French soldier who's trapped with five other men in an underground German blockhouse during WWII. Although the prison is well stocked with food and supplies, their ordeal proves mentally and physically trying when it stretches to a period of more than six years. Based on a novel by Jean Paul Ciebert (which was inspired by real events). With Charles Aznavour, Nicholas Jones, Peter Vaughan, Jeremy Kemp, and Leon Lissek.  93 minutes.