Stomach on Strike - S1.E42

Sick of the constant abuse Entree heaps upon them, his stomach, heart and brain suddenly jump out of his body, abandoning him. Entree then ingests Peri, having him fulfill the roles of his AWOL organs. After a few false starts, the arrangement becomes satisfactory for both of them. However, Entree's organs return, having outstayed their welcome by annoying everone else on the island.