Knock! Knock! Who’s there? Cargo…

Knock! Knock! Who's there? An extraterrestrial An extraterrestrial who? Wait–how many extraterrestrials do you know?

Knock! Knock! Who's there? Water. Water who? Water those plants or they're going to die!

Knock! Knock! Who's there? Andrew! Andrew who? Andrew a picture!

Knock! Knock! Who's there? Dozen. Dozen who? Dozen anybody want to let me in?!

Knock! Knock! Who’s there? Nun. Nun who? Nun of your business!