'The Death Pit' by A.L. Kennedy

Something odd is going on at the Fetch Brothers Golf Spa Hotel. Receptionist Bryony Mailer has noticed a definite tendency towards disappearance amongst the guests. She's tried talking to the manager, she's even tried talking to the owner who lives in one of the best cottages in the grounds, but to no avail. And then a tall, loping remarkably energetic guest (wearing a fetching scarf and floppy hat) appears. The Fourth Doctor thinks he's in Chicago. He knows he's in 1978. And he also knows that if he doesn't do something very clever very soon, matters will get very, very out of hand.

Notes:
*Featuring the Fourth Doctor

*A BBC Books 'Time Trips' eBook

*Time-placing: the Doctor is wearing his outfit as seen in Season 12, when he is travelling with Sarah and Harry; however, he remarks that he does not have anyone with him at the moment. So I'm choosing to place this story between the television adventures 'The Deadly Assassin' and 'The Face of Evil', on the basis that he has just decided to dress in his old clothes for a change!

*This story was later expanded into the longer BBC Books novel 'The Drosten's Curse'