Henry Blake: All I know is what they taught me at command school. There are certain rules about a war, and rule number one is that young men die. And rule number two is that doctors can't change rule number one.
Season 4. Episode 1 "Welcome To Korea". At the end of the episode the new commanding officer, Colonel Sherman Potter, played by Harry Morgan is introduced. In Season 3 Episode 1 "The General Flipped at Dawn", Harry Morgan played Major General Bartford Hamilton Steele.