Jamie Farr was not the first cast member of M*A*S*H to go drag...
Harry Morgan (a/k/a Colonel Sherman Potter) did so in a 1960’s sitcom called Pete & Gladys.
It is hard to imagine this aired on CBS in the 1960’s... but the reality is that it did. And it is funnier (and a wee bit racier) than a lot of what is on TV today.
And so... ladies and gentlemen... Pete & Gladys (sponsored by Goodyear).