The Avengers (1961)

S2E1 Mr Teddy Bear

During a live television interview, a man is killed in a shocking murder. one-Ten suspects the notorious assassin known as Mr. Teddy Bear is behind the crime. To catch him, he enlists Cathy Gale's help to devise a plan that will lure the assassin into a trap by orchestrating a situation where Mr. Teddy Bear is compelled to target Steed.