Web of Fear: Yeti Invade the Underground Shelter

The Doctor's particular brand of courage, which fell under "crazy-stupid" won no points in Yeti Combat. It did, however, earn him the unswerving loyalty of UNIT soldiers everywhere, who recognized inside that odd little alien a kindred spirit with their beloved "Try Bullets on it" Brigadier.

I was frowning away at this odd thing on his clothes when I realized Pat was whaling away at the Yeti so hard one of his braces' buttons went flying off into space. You go, Pat!