I'll stop this thing, whatever it is... though in a manner you may find somewhat disquieting! 
House of Mystery #312 is an issue of the series House of Mystery (Volume 1) with a cover date of January, 1983. It was published on October 21, 1982.
Synopsis for I... Vampire! "The Thing in the Tunnels"
Andrew Bennett is finally back home in New York City with Deborah Dancer and Dmitri Mishkin. In the newspapers they read about a series of missing persons in the subway, which seem to be the work of more vampires. Bennett goes down to investigate on his own, and meets a reporter named Maggie Carle. They're attacked by a giant insectoid beast who belongs to Barr Laboratories, the company responsible for creating a cancer cure that made humans poisonous to vampires. A team of men working for Barr Laboratories descend on Bennett and Carle with guns, insisting that they come with them.
Appearing in I... Vampire! "The Thing in the Tunnels"
Featured Characters:
Supporting Characters:
- Deborah Dancer
- Dmitri Mishkin
- Maggie Carle (First appearance)
Antagonists:
- Allen Barr (Behind the scenes)
Other Characters:
- Cain (Host)
Locations:
Synopsis for "Jenny, Are You There?"
Appearing in "Jenny, Are You There?"
Narrator:
- Cain (Host)
Characters:
Locations:
Items:
Vehicles:
Synopsis for "Suicide Club"
Appearing in "Suicide Club"
Narrator:
- Cain (Host)
Characters:
Locations:
Items:
Vehicles: