It's Halloween. On a farm in Texas, an old man and his son witness the arrival of an alien space ship whose passengers start firing as soon as they arrive. As the man and his son flee, they bump into the TARDIS, the Eleventh Doctor and Amy Pond dressed up, ready to go trick or treating. Taking shelter back at the farmhouse, the Doctor remembers a recent encounter on the planet Thursday, next Wednesday, where the natives shrink the heads of their enemies and display them as a warning. Gathering up the harvested pumpkins, the Doctor gets them all carving.