The Ship/Quarry Kills

Jack

 * Part 2, on Gavin via blunderbuss he found in a box in front of Gavin

Geoff

 * Part 4, on Michael with a shotgun as he Titanic'd Team Best Friend (Michael and Brandon). His Tommy Gun had run out of ammo earlier.
 * Part 4, with a khukri (his second attempt, Jeremy got him with a frying pan before he could get the first one)

Jeremy

 * How To: The Ship, on an AI with a syringe
 * How To: The Ship. on Matt (who witnessed the syringed AI's death) via rolling pin ("ANGRY SITCOM WIFE!") (Matt took two revolver bullets and lived)