Michael Mark and Boris Karloff made 6 films together, and the 5 rated ones average 6.44, 0.20 above their career marks. The best is Frankenstein at 7.5.

Films together

1931 to 1944

Average together

6.44

5 rated, weighted 6.55

Lift

+0.20

apart 6.24

Best together

7.5

Frankenstein

Apart against together+0.20 lift

6.12

6.35

Other pairings

Their other regulars

Boris Karloff with

Films with Michael Mark and Boris Karloff

The Yellow Ticket	1931	·	16	as Baron's Secretary	as Drunken Orderly
Frankenstein	1931	7.5	1,865	as Ludwig (uncredited)	as The Monster
Son of Frankenstein	1939	6.7	285	as Ewald Neumüller	as The Monster
Tower of London	1939	6.2	53	as Henry VI's Servant	as Mord
The Mummy's Hand	1940	5.7	104	as Bazaar Owner	as Kharis (archive footage / uncredited)
House of Frankenstein	1944	6.1	191	as Strauss	as Dr. Gustav Niemann