Combat!

The Masquers (5x21)

Air date: Feb 14, 1967

No one can tell friend from foe as Germans infiltrate dressed as Allied solders. Kirby, separated from the squad, takes Carl Driskoll prisoner, not sure if he is an American or a German. They are both then captured by British Cpl. Tommy Behan, who is unsure who to trust. Along the way they pick up yet another dressed as an American.