was an American actor, comedian, and director, best known for his television role as Maxwell Smart (Agent 86)
on the NBC
comedy series Get Smart
. He was also well-known for voicing the titular character
in the animated series Tennessee Tuxedo and His Tales
and was the original voice of the titular character
in the cartoon series Inspector Gadget
For Disney, he voiced Principal Hickey in Pepper Ann, and played Brain in the 1999 live-action film adaptation of Inspector Gadget, a nod to his voice role as the titular character in the animated series. He was considered to voice Shere Khan in The Jungle Book.