See more knock-knocks here.

Knock-knock. Who’s there? Ice cream.  Ice cream who?  Ice cream if you don’t let me in.

Knock-knock. Who’s there? Old lady.  Old lady who?  Didn’t know you could yodel.

Knock-knock. Who’s there? Alex.  Alex who? Alex the questions around here!

Knock-knock. Who’s there? Yah.  Yah who?  No thanks, I prefer Google.

Knock-knock. Who’s there?  Doctor.  Doctor Who?  Great show, isn’t it?

Knock-knock. Who’s there?  Dishes.  Dishes who?  Dishes the police – come out with your hands up!

Knock-knock. Who’s there?  ARCH.  Arch who? Sounds like you’re coming down with a cold.