Paul Winchell, along with Jerry Mahoney and Knucklehead Smiff, made a guest appearance on The Lucy Show in October 1966. The plot? Winchell, visiting the bank where Lucy Carmichael (Lucille Ball) works, is cajoled into doing a charity show. As it ends up, he uses Lucy as a giant ventriloquist puppet!!
Ball & Winchell would meet twice more, both on Here's Lucy, which, although Lucy played a different character, was the follow-up to this series.