Question: What part did the star of The Michael J. Fox Show have on Spin City?

Context paragraphs:
Juliette Goglia: Juliette Rose Goglia (born September 22, 1995) is an American actress.  She is best known for portraying Sierra in the Disney Channel series "That's So Raven", Hannah West in the CBS series "", and Eve Henry on "The Michael J. Fox Show".

The Churchills (American band): The Churchills are an indie pop/rock foursome from the New York/New Jersey area.  They are probably most commonly known for their appearance on the television show Spin City, during season 3 in the episode titled "Internal Affairs".  They performed their song "Everybody Gets What They Deserve" at the end of the show in front of the Flatiron Building in Manhattan.  This same song is also featured in the TV show Scrubs, in the episode titled My Lips Are Sealed.  Meadow Soprano wears a band T-shirt in Episode 3 of Season 2 of The Sopranos, and again in Episode 3 of Season 3.

Tom Degnan: Tom Degnan (born September 24, 1982 in Bucks County, Pennsylvania) is an American actor.  He is best known for his role on "One Life to Live" as Joey Buchanan from 2010 to 2011.  He also appeared in "As the World Turns" in 2009 as Riley Morgan/Adam Munson.  Additional appearances include "Handsome Harry", alongside Steve Buscemi, and "Little Miss Perfect", alongside Lilla Crawford.  In 2013 he played the role of Fire Marshall Rick Kelly in the 10th episode of the 4th season of the CBS police procedural drama "Blue Bloods" in the episode "Mistaken Identity".  He has also played roles in the TV shows "Lipstick Jungle", "Law & Order", "The Unusuals", "The Good Wife", "White Collar", "The Following", "Magic City", "Person of Interest", "The Michael J. Fox Show", "Madam Secretary", and "The Sonnet Project".  In 2013 he played the role of Chris Van Helsing in the made-for-TV movie "Gothica" and played the role of Matt in the 2014 made-for-TV movie "Tin Man".  In 2015 he played the role of Jim in the romance-drama film "To Whom It May Concern" and played the role of Tom in the short story drama film "Seclusion".  Degnan also had a recurring role on CBS's "Limitless".

The Michael J. Fox Show: The Michael J. Fox Show was an American television sitcom starring Michael J. Fox.  The series aired on NBC in the United States from September 26, 2013, to January 23, 2014, as part of the 2013–14 American television season.  Fox made his regular return to television for the first time since he was on ABC's "Spin City".  It was his second NBC series, as he appeared on that network's sitcom "Family Ties" from 1982 to 1989 as Alex P. Keaton.

Prototype (Spin City): Prototype is the pilot episode of the ABC sitcom Spin City.  The episode was written by Gary David Goldberg and Bill Lawrence, and directed by Thomas Schlamme.  It marked the first appearance of Michael J. Fox's character Mike Flaherty.

Michael J. Fox: Michael Andrew Fox, OC (born June 9, 1961), known professionally as Michael J. Fox, is a Canadian-American actor, author, producer, and activist.  With a film and television career spanning from the 1970s, Fox starred in the "Back to the Future" trilogy, where he portrayed Marty McFly.  Other notable roles have included Mike Flaherty on the ABC sitcom "Spin City" (1996–2000), for which he won five Emmys, four Golden Globes, and two Screen Actors Guild Awards and his portrayal of Alex P. Keaton on the American sitcom "Family Ties".

The Michael J. Fox Foundation: The Michael J. Fox Foundation for Parkinson's Research is dedicated to finding a cure for Parkinson's disease (PD) through funded research and ensuring the development of improved therapies for those living with Parkinson's today.  Established by actor Michael J. Fox in 2000, the Foundation has since become the largest nonprofit funder of Parkinson's disease research in the world, investing more than $650 million in research to date.  In 2010, the Foundation launched the first large-scale clinical study on evolution biomarkers of the disease at a cost of $45 million over five years.

Spin City: Spin City is an American television sitcom that aired from September 17, 1996, until April 30, 2002, on ABC.  Created by Gary David Goldberg and Bill Lawrence, the show was based on a fictional local government running New York City, and originally starred Michael J. Fox as Mike Flaherty, the Deputy Mayor of New York.  Fox departed in 2000 at the conclusion of Season 4 due to his battle with Parkinson's disease, and Charlie Sheen assumed the lead role of Charlie Crawford for the remaining two seasons.  The show was cancelled in 2002 due to low ratings.

J. B. Adams: J.B. Adams (born September 29, 1954) is an American character stage and film actor, director, and singer.  He has credits in film, television and, most notably, musical theatre.  Originally from Oklahoma City, Oklahoma, he attended Oklahoma City University, where he studied voice, piano, opera, and musical theatre, after which he became a New York-based Broadway actor.  He is perhaps best known for his roles in the Broadway productions of "Beauty and the Beast" (as Maurice, the father), "Annie" (as Rooster/Drake/Bert Healy/FDR), "Parade" (as Luther Rosser), "Me And My Girl" (as Sir Jasper), and "Chitty Chitty Bang Bang" (as Grandpa Potts).  He played the role of Morris Farnsworth in the film "Far From Heaven", as well as originating the same role in the Off-Broadway musical adaptation (2013).  On TV and the web, he has played Santa for Verizon FiOS and has had guest starring roles on "" and "The Michael J. Fox Show".

Michael Hobert: Michael Hobert is an American actor.  He had a recurring role on the TV show "Scrubs" as Lonnie.  His brother, Tim Hobert, is one of the show's producers.  Michael has also starred in "Spin City", "Matter of Life and Death", and "Gilmore Girls".  He also wrote a movie with Sam Jaeger called "Advantage Hart".  Michael was originally in the first episode of "Scrubs", "My First Day", as "Pizza Delivery Guy", who was the guy in the MRI machine.

Supporting paragraphs: The Michael J. Fox Show Spin City
Answer: Mike Flaherty