All of today's comics share a single punchline

Nancy, 2013-12-12.

Paying orphans sub-standard wages to scrub floors. Sure, that sounds like Christian charity to me. Or a return to 19th century labour practices. Either or.

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Heathcliff, like Batman, has a car designed to suit his theme — that theme being Heathcliff. Unlike Batman, Heathcliff uses his car to go to the shops to buy milk rather than to fight crime.

Heathcliff, 2013-12-12.

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"Oh, doctor." calls Flo. "Just the person. Can I ask your advice? I've got this terrible irritating pain and I'm not sure what to do"
"Where is the pain?" asks the Doctor, totally unaware that he's walking right into a real knee-slapper.
"He's at home" says Flo.

She means Andy, you see. She's not in pain, she's saying that Andy is a pain. That's the joke.

Andy Capp, 2013-12-12.

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I'm dog-sitting for my neighbors while they're out of town." says Fitch.
"Cool." says Dustin, patting the dog on the head.
"But Charlie has fleas. Yesterday I found one on my ankle."
Dustin immediately stops patting the dog.
"So go to the pet store and buy a flea collar." he says.
"I did that." says Fitch, "But it made my neck itch."

You'd expect him to have put the flea collar on the dog, but actually he tried it on himself. It's funny because it confounds our expectations.

Dustin, 2013-12-12.

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Based on the 1946-11-04 The Phantom strip. The last sentence of the first dialogue balloon serves as an alternate punchline for every one of the other comics featured today.