Murray plays midwife to Lee Anne and Keith's love child, and reveals, to everyone's dismay, that Keith's brother Glenn is actually adopted.

How will Keith fare in comparison to his human ancestors in the fight for survival this week? Can Keith manage to fend for himself?

Will Keith survive being locked in a really confined space like the birthday cupboard; and what happens when you swallow a ball of wool?

Murray teaches Keith and the Urban Monkeys about the power of knowledge; and they look at what a dog's tail wag really means.

Murray attends a party with the Urban Monkeys - but is he really a welcome guest? Can Keith make any friends? Can Siamangs cook pastry?

Will Keith be able to grasp the concept of love by the end of the episode? Will Lee Anne fall in love with Keith?

What does Keith think about when he's bored? What does a Siamang quiche taste like, has Ranger Tim ever eaten one? What is 'stress'?

Keith is pushed to the absolute brink of emotional oblivion when Murray happily exploits his love for Lee Anne by introducing some male competition.

Murray kisses Rowan, the baby alpaca; and why does his final, fatal experiment on Keith leave Lee Anne feeling angry? Can Keith survive death?

Will Lee Anne's love for Keith really be enough to bring him back from the dead? Can anyone pronounce the word 'defibrillator'?