Fergal Costello

SF comedy set after Earth has been invaded by a race of aliens, the Gu'un. A hapless human called Stewart is appointed the Gu'un's official liaison, is saddled with an alien housemate and must deliver their message to the masses.

A weary slasher villain puts in the hours and planning necessary to pull off perfect kills until he encounters victims that don't behave like they should, dammit.