M*A*S*H Season 2 Episode 24
A classic episode in which Colonel Flagg and another secret agent from another intelligence agency come to the 4077th to keep their eyes on one another and the camp. Hawkeye and Trapper trick them both into thinking that Burns is a traitor – one thinks he’s a fascist, the other thinks he’s a communist. Vinny Pratt, a friend of Trapper’s turns up.