Sandar, Senator	chimpanzee	male	POTA (2001), POTA: Force, POTA: Resistance	Warner, David	inhabitant of ape city of Derkein, father of Ari
Sarai	human	female	POTA: Force, POTA: Resistance		chief of Tek clan, born of Wilding father; mother of Daena, married to Karubi
Semos	chimpanzee	male	POTA: The Fall		né Jonathan, fostered by Molly Benavides; founder of ape colony, husband of Aspasia, father of Thados and Zaius
Seneca	gorilla	male	Human War (Dark Horse Comics)		rebel soldier
Skipper	human	male	Beneath the POTA	Andrews, Tod	real name not given in film; commanding officer of Lt. John Brent on reconnaissance trip for Col. Taylor; married, 2 daughters; dies after crash landing
Spokka	ape		Return to the POTA Ep. 4 "Tunnel of Fear"		character from ape television series "Spokka the Space-Ape"
Stanton, Doctor	human	male	Return to the POTA		scientist who developed the theory of "time thrust", which NASA Venturer crew sets out to test
Stewart, Lieutenant	human	female	POTA (1968)	Stanley, Dianne	one of 4-member crew aboard Icarus; dies en route due to leak in cryogenic chamber
Suni	human	male	POTA: Resistance		member of Tek clan (?), father of Tarik
Surgora the Bold	gorilla (?)	male	Return to the POTA Ep. 4 "Tunnel of Fear"		historical reference: 100 years prior, Surgora, of the greatest ape generals, attempted to cross Forbidden Zone with his forces and failed