Released six years after The African Queen. Had similar elements. The romance, such as it was, was probably more plausible. There was no unreasonable cheerfulness. Essentially had only two speaking roles.
During World War Two, Marine Robert Mitchum, after floating for days on rubber raft, lands on an island. There's an abandoned village and in a church, is nun Deborah Kerr, the only person on the island. She's only been there a few days herself.
Things are fine until the Japanese land and set up a weather station. The two have to hide in a cave.
Mr Allison falls in love with Sister Angela and doesn't see the point of her remaining a nun since they're isolated on an island, although I suppose it makes more sense for her to remain a nun than for him to still be a Marine.
They compare being a Marine with being a nun. The main similarity was probably the haircut.
Filmed in Trinidad and Tobago. Local Asians played the Japanese and the Marines were provided by the U.S. military.
Available on The Criterion Channel.