Guest Stars Mark Pellegrino as Jarold Kempfer John Pyper-Ferguson as Hayden Walker Maddie Hasson as Carly Kempfer Co Starring Hunter Jackson as Todd Cooper Bombadil as Cousin #1 Kendall Wells as Kyle Patrick Oury as Cousin #2 Kelli Kirkland Powers as Dr. Hodgkins Michael Mendelson as Dr. Saliman Kanin Howell as Al's Second Mechanic Jason Rouse as Marty