>> aspinall: you're so silly. though, because she get more than anyone else. >> stahl: do you think that you have brought them home? >> aspinall: without any question. yeah. >> stahl: but they weren't totally free yet. damian's idea was to complete this bridge only when he felt they could fend for themselves. >> aspinall: and just over the other side of that bridge is the true wilderness. >> stahl: they don't swim. >> aspinall: no. so, here, they're protected because they're on an island. but once they cross the bridge, they'll come across elephants and leopards and other gorillas. djala's going to be, you know, defending his females. he might lose some of his females. it could become very stressful. >> stahl: you mean, other males... >> aspinall: other males, yeah. >> stahl: ... who are there wild... >> aspinall: yes, wild, who want his females. >> stahl: ...will challenge him for his females. but damian thinks this family is ready, and so he and his crew put the final planks on the bridge. then, he tries to lure