REVOLT of the MORLOO!
The MORLOO's final appearance came in House of Secrets #72 (May 1965, pictured right), where cover-boy Morloo (mushy version) declares, "I am no longer under your control, Doctor 7 -- I will destroy both YOU and Mark Merlin!"
The story inside, "Revolt of the Morloo," like the other two Morloo tales, was written by Jack Miller, but this time, the art was by Bernard Baily. In Morloo's swan song, Mark Merlin accidentally frees Mushy Morloo from Doctor 7's command, and our pal Morloo proceeds to attack both Mark Merlin AND his former master!
Can Mark Merlin defeat the rebellious Morloo? Let's find out...