The X-Files

Mulder drags a very unwilling Scully to a haunted house on Christmas Eve, because of course he does. Two lovelorn ghosts, played with great relish by Ed Asner and Lily Tomlin, have big plans for their evening, and most of them involve getting under the agents' skin. It's one house, four actors and a great deal of creaking, a bottle episode that turns festive spooky into something properly funny. Think of every family Christmas where nobody can find the door. Draw the curtains, dim the lights and keep a mince pie handy, because Mulder will not be leaving without an argument.