WWII suspense/drama about a freighter in the Pacific with Brando and Brynner

A German expatriate pacifist (Marlon Brando) is forced to pose as an SS Standard Leader for the purpose of disabling the scuttling charges on a merchant ship carrying rubber vital to the German war effort. Yul Brynner plays the disillusioned captain (Mueller), Martin Benrath the gun-ho first officer (Kruse), Janet Margolin an abused Jewess captive (Esther) and Hans Christian Blech a notable crewman (Donkeyman).

Released in 1965 and unfortunately shot in B&W, “Morituri” is a suspense/drama taking place almos... les resten.

"Crain" (Marlon Brando) is quietly sitting out WWII at his home in India when he gets a visit from the "Col. Statter" (Trevor Howard) who delivers a few home truths in order to get him to volunteer to help commandeer a ship loaded with rubber leaving Japan and heading to Nazi controlled Bordeaux. His task is to use his expertise to disable the scuttling explosives hard-wired aboard in the event of any aggressor interfering with it's journey. As it happens, the newly appointed captain of the boat - "Mueller" (Yul Brynner) - is not best pleased at having his crew supplemented by a group of ne'er-... les resten.