Hammer + Wm. Castle should equal a DVD release!
I collect Hammer. I collect William Castle. So do many others. A reasonable DVD price, and this movie will sell! I would imagine Columbia Pictures still has the U.S. rights to "The Old Dark House" (1963), "Maniac" (1963), and "Creatures The World Forgot." They don't share a common theme, but it would make a nice Hammer DVD set.