Biography
William Henry Pratt (November 23, 1887 – February 2, 1969), better known as Boris Karloff, was an English-born actor who emigrated to Canada in 1909. Karloff is best remembered for his roles in horror films and his portrayal of Frankenstein's monster in Frankenstein (1931), Bride of Frankenstein (1935), and Son of Frankenstein (1939). His popularity following Frankenstein was such that for a brief time he was billed simply as "Karloff" or "Karloff the Uncanny". His best-known non-horror role is as the Grinch in the television special of Dr. Seuss’s How the Grinch Stole Christmas!. Description above from the Wikipedia article Boris Karloff, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Known For

Rendezvous in Black
Ward Allen

Dynamite Dan
Tony Garcia

The Mesmerist
(archive footage)

The Horror Show
(archive footage)

The Nickel-Hopper
Dance Hall Masher

House of Frankenstein
Dr. Gustav Niemann

Mr. Wong in Chinatown
Mr. James Lee Wong

Heart of Darkness
Mr. Kurtz

The Raven
Dr. Scarabus

The Climax
Dr. Friedrich Hohner