While the majority of the films in the SHOCK! package have been released on DVD, a good number are only available on out-of-circulation videos or bootlegs--and a few are unavailable anywhere.
Shock films missing in action on DVD, but not on video:
House of Horrors The Mad Ghoul The Mystery of Edwin Drood Nightmare
Shock films only available from select "grey-market" dealers:
The Cat Creeps Chinatown Squad The Great Impersonation The Last Warning The Mad Doctor of Market Street The Man Who Cried Wolf The Mystery of Marie Roget Mystery of the White Room Reported Missing! The Secret of the Blue Room Secret of the Chateau The Spider Woman Strikes Back The Spy Ring The Strange Case of Doctor Rx The Witness Vanishes
Shock films currently unavailable:
Danger Woman A Dangerous Game Destination Unknown Sealed Lips