Baron von Morbidor was the villain for the much-reviled Tenth Inspector episode "Hate & Heroes". He swallowed his victims whole, after which they could scream through the villain's flatulence.

Notably, Baron von Morbidor was a villain concept chosen from a children's contest held by the BTV. Needless to say, they never attempted such an idea again (the villain's original creator, a Welsh 6-year-old, has admitted that he regrets participating).

Baron Von Morbidor

The Dungeon Demon of Halogenia