In high school I had a math teacher who bore an uncanny resemblance to Tom Baker, fourth iteration of the title character in the long-running BBC-TV sf serial Doctor Who. The senior class ahead of mine bought him the trench coat, ours got him the scarf - he was a good sport about it, wore them in cold weather and even handed out jelly babies in class.
We also had a science teacher who was a dead ringer for Irish singer Feargal Sharkey.