Knock Knock Jokes

Joke: Knock knock!
Who's there?
Luke!
Luke who?
Luke through the window and see!

Joke: Knock knock!
Who's there?
Knock.
Knock who?
Knock knock!
Who's there?
Knock.
Knock who?
(Keep this going as long as you possibly can.)

Joke: Knock knock!
Who's there?
Mary
Mary who?
Marry me!

Joke: Knock knock!
Who's there?
John Danglerdoo!
John Danglerdoo who?
Really, how many John Danglerdoo's do you know? Let me in it's cold out here.

Joke: Knock knock!
Who's there?
Nobody
Nobody who?
...

Joke: Knock knock!
Who's there?
Sham!
Sham who?
Are you calling me fat?

Joke: Knock knock!
Come in!
You ruined the joke!

Joke: Knock knock!
Who's there?
Goliath!
Goliath who?
Goliath down, you lookith tired!

Joke: Knock knock!
Who's there?
Doctor.
Doctor who?
I love that show.

Joke: Knock knock!
Who's there?
I scream.
I scream who?
What are you? An angry owl?