Nature Calls (S02E12)

S02E01 An Out of Body Experience (1) S02E02 An Out of Body Experience (2) S02E03 Lights Out! S02E04 The Conqueror Worm S02E05 Puberty Alert S02E06 Tricky Ricardo S02E07 Aunti Histamine S02E08 A Growing Cell S02E09 A Cold Day In Hector S02E10 Supplements (aka Triumph of the Supplements) S02E11 Double Dose (aka Ozzy and Ozzy) S02E12 Nature Calls S02E13 Cavities (aka Journey to the Center of the Tooth)