Knock Knock Doctor Who Shirt Size:Small Operation was introduced in 1965

Operation was introduced in 1965

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Knock Knock Doctor Who Shirt Size:Small Operation was introduced in 1965This Doctor Who shirt illustrates a knock knock joke that takes place at the door of the good Doctor's TARDIS. Even though this is an amusing joke on its own, you might need a Type 40, Mark 1 TARDIS for a humorous visual. If you are a fan of Doctor Who, this is the perfect shirt for you. You'll have others laughing harder at this shirt than at some of the Doctor's whimsical comments.