Halloween III: Season of the Witch is a 1982 American science fiction horror film and the third installment in the "Halloween" film series.
 It is the first film to be written and directed by Tommy Lee Wallace.
 John Carpenter and Debra Hill, the creators of "Halloween", returned as producers.
 Starring Tom Atkins as Dr. Dan Challis, Stacey Nelkin as Ellie Grimbridge, and Dan O'Herlihy as Conal Cochran, the story focuses on an investigation by Challis and Grimbridge into the activities of Cochran, the mysterious owner of the Silver Shamrock Novelties company, in the week approaching Halloween night.
Bruce Paul Abbott (born July 28, 1954) is an American film, stage, and television actor.
 Originally beginning his career in theater, Abbott later gained notoriety for his role as Dr. Dan Cain in the cult sci-fi horror films "Re-Animator" (1985) and "Bride of Re-Animator" (1990).
Dr. Dan Matrazzo is a jazz, jam, rock, and fusion American keyboardist and pianist.
 He started playing piano at the age of three in 1962 and performed classical recitals growing up in Tokyo.
 His uncle was a very well known big band leader and bassist Ono Mitsuru.
 Dr Dan was the co-founder and co-producer of the Fiji Mariners featuring Col. Bruce Hampton and Joseph Patrick Moore.
 He was also a member and composer for legendary Grammy winning blues artist Clarence "Gatemouth" Brown.
Bride of Re-Animator is a 1990 American science-fiction horror film directed by Brian Yuzna and was written by Yuzna, Rick Fry and Woody Keith.
 H. P. Lovecraft wrote the original serialized story, titled "Herbert West–Reanimator", from which the characters were derived.
 The plot roughly follows episodes "V.
 The Horror from the Shadows" and "VI.
 The Tomb-Legions" of the original.
 The film stars Bruce Abbott, Claude Earl Jones, Fabiana Udenio, David Gale, Kathleen Kinmont, and Jeffrey Combs.
Herbert West is a fictional character created by H. P. Lovecraft for his short story "Herbert West—Reanimator", first published in 1922.
 There have been several film adaptations of the story including Herbert West as played by Jeffrey Combs in the "Re-Animator (film series)" which include the 1985 "Re-Animator" film and its two sequels, "Bride of Re-Animator" and "Beyond Re-Animator".
Daniel Glenn Doornink (born February 1, 1956 in Yakima, Washington) is a former professional American football running back in the National Football League who played one season for the New York Giants and seven for the Seattle Seahawks.
 Seahawks fans, WSU Cougs actually, gave him the nicknames of "Dr. Dan" for his medical career, and "Mr. 3rd down" for his uncanny knack of frequently picking up a first down for the team on 3rd down when given the ball via run or pass.
 He ran for 123 yards on 27 carries for the Seahawks in a wild-card playoff win over the Los Angeles Raiders on December 22, 1984 in the Kingdome in Seattle.
Dr. Dan Richard Jones is a professor in the Department of English at the University of Central Florida in Orlando, Florida and a Fellow of the Society for Technical Communication.
 He earned his B.A., M.A. and PhD degrees from Florida State University in 1974, 1976 and 1979 respectively.
The Diversity Foundation, also known as Smiles for Diversity, is a nonprofit organization started by Dr. Dan Fischer, who was raised in the polygamous community of the Fundamentalist Church of Jesus Christ of Latter Day Saints and who is a former member of the FLDS church.
James Smillie is a Scottish and Australian actor known for his roles in flm, stage and television productions and voice over and animation.
 Smillie was born in Glasgow, Scotland and emigrated to Australia before returning to the United Kingdom to appear in stage roles in London's West End.
 On television, he is probably best known internationally for his role as Dr. Dan Marshall in the lavish 1980s Australian series "Return to Eden".
Re-Animator, also known as H. P. Lovecraft's Re-Animator, is a 1985 American science-fiction horror comedy film loosely based on the H. P. Lovecraft episodic novella "Herbert West–Reanimator".
 Directed by Stuart Gordon and produced by Brian Yuzna, the film stars Jeffrey Combs as Herbert West, a scientist who invents a solution which can re-animate deceased bodies.
 He and Dan Cain (Bruce Abbott) begin to test the serum on dead human bodies, and conflict with Dr. Carl Hill (David Gale), who is infatuated with Cain's fiancée (Barbara Crampton) and wants to claim the invention as his own.

Question: Who is the actor who played Dr. Dan Cain in"Re-Animator" and  "Bride of Re-Animator"?
Answer: Bruce Paul Abbott