  ==Hollywood Squares episode==  This incident was not unprecedented; the same thing happened with Wally Cox in the early 1970s. Both contestants needed his square to win, and they had to go back and forth at least half a dozen times (probably more) before someone finally won. I recall Cox managing to maintain his usual deadpan until the very end, when he finally cracked a smile. This episode probably has been destroyed, but I thought I'd mention it here in case anyone else remembers.   