M*A*S*H S06 E03 Last Laugh

"Goodbye, Farewell, and Amen."

Madness strikes as B.J. and his old friend Bardonaro play a series of practical jokes on each other, just as Bardonaro is about to leave Korea. Hawkeye gets the last laugh. He sends Bardonaro off without his traveling papers, and in a jeep with too little gas.