• Young Tarzan flees to the desolate region of the Dark Mountain when he is overcome by feelings of inadequacy as an ape.  He is captured by a trio of outcast large apes - Mama Gunda, a tough old she-ape; Kago, her violent son; and Uto, his dimwitted brother (top) - who are terrified of a monster named Zugor.  He escapes and stumbles upon a grouchy old ape who lives alone in a cave (right).  Tarzan discovers that this is Zugor, who has created the boogeyman myth to preserve his privacy.  Terk, Tantor and Kala arrive at the Dark Mountain looking for Tarzan, but Mama Gunda and her boys attack Kala and throw her over a waterfall.  Tarzan arrives to save Kala and Zugor realises he is attracted to Mama Gunda while they are fighting.   He decides to join her family and sets about imposing some moral discipline on her two boys.  Tarzan is happy to be reunited with his mother and Zugor, his new friend, points out to him that his cleverness is a special gift that makes him unique amongst the apes.