The Bedford Incident (1965)

Starring:

• Sidney Poitier
• Richard Widmark
• James MacArthur

IMDB.com
Richard Widmark plays a hardened cold-warrior and captain of the American destroyer USS Bedford. Sidney Poitier is a reporter given permission to interview the captain during a routine patrol. Poitier gets more than he bargained for when the Bedford discovers a Soviet sub in the depths and the captain begins a relentless pursuit, pushing his crew to the breaking point. This one's grim tension to the end.