Maxwell Smart

 "Am I wearing boxers? For future reference, I usually prefer briefs for their security and peace of mind. Going free-bird is not exactly ideal. I don't like it."

Maxwell Smart, code number Agent 86, is the central character. Despite being a top secret government agent, he is absurdly clumsy, very naive and has occasional lapses of attention. Due to his frequent verbal gaffes and physical miscues, most of the people Smart encounters believe he is grossly incompetent. Despite these faults, Smart is also resourceful, skilled in hand-to-hand combat, a proficient marksman, and incredibly lucky. These assets have led to him having a phenomenal record of success in times of crisis which means his only punishment in CONTROL for his mistakes is that he is the only agent without three weeks annual vacation time. Smart uses multiple cover identities, but the one used most often is as a greeting card salesman/executive. Owing to multiple assassination attempts, he tells his landlord he is in the insurance business, and on one occasion, that he works for the Internal Revenue Service. Agent 86 is known for his use of the shoe phone, a secret communication device. Adams appeared in every episode, though only briefly in the episode "Ice Station Siegfried" (due to Don Adams' objections to the script). Smart served in the US Army during the Korean War and is an ensign in the US Navy Reserve.

(From Wikipedia)