Yes he did. It was Colonel Blake that didn’t make it home. Damn was THAT an episode or what?!
Oh, yes.
They only told Burghoff what happened to Blake right before they shot the final scene, the rest of the cast had no idea, so they wanted to get a real reaction out of them.
I remember that episode Alan Alda etc learning about a plane crash and someone dying...
The MASH scene that will forever stay with me was the final episode when Hawkeye finally admits to Dr. Freedman the reason he had gone crackers. That was gut-wrenching stuff.