Episode #212 "Jolly Old St. Dick"

The aliens' first impression of Christmas is that it's about shopping and killing trees; Sally gets a job at the mall as a gift wrapper, while Harry is employed as one of Santa's elves and brings home the most pathetic Christmas tree in Ohio. While Sally and Harry throw themselves into their jobs with great enthusiasm, Dick can't quite get the hang of how the office gift exchange works, and Tommy stresses about what sort of very special gift August is expecting. Dick goes out with a chainsaw in search of the definitive tree and is accosted by the local police, Sally's customers get crankier and more demanding, Harry is mortified to learn that he's working for not the real Santa but an imposter, as the aliens start to become disenchanted with the holiday season. Dick shocks Nina and his class with his "bah humbug" attitude, and Harry freaks out when he encounters three Santas in a bar, but when Christmas actually arrives everyone catches the spirit and celebrates.