Harlan/Melvin is a joint-head man in the episode "The Dork Knight". Harlan and Melvin share the same human body but their heads are merged together. The right side of the head is Harlan and the left Melvin. He has three eyes, two noses, two mouths and two ears. Harlan seems to be the one in charge.

Harlan/Melvin goes to an old warehouse to buy drugs from Sabrina Maroney. Francis Grimes has been monitoring the drug deal from a ceiling beam, but is attacked by a bat boy and falls to the ground. Harlan/Melvin, Sabrina and her gang of cat burglars immediately escape from the warehouse.