Question: Blood Link starred which actor and musician, known for his role on Law and Order?

Context articles: J. K. Simmons
Rambo: First Blood Part II
Persona
Alberto De Martino
Blood Link
Gerry Rosenthal
Michael Moriarty
Jill Tasker
Steven Boyer
Matthew Morrison

Jonathan Kimble "J. K." Simmons (born January 9, 1955) is an American character actor and voice actor.
 In television, he is known for playing Dr. Emil Skoda on the NBC series "Law & Order" (and other "Law & Order" franchise series), neo-Nazi Vernon Schillinger on the HBO prison-drama "Oz", and Assistant Police Chief Will Pope on TNT's "The Closer".
 His film roles include J. Jonah Jameson in Sam Raimi's "Spider-Man" trilogy and music instructor Terence Fletcher in 2014's "Whiplash".
 He is also known for voicing Cave Johnson in the video game "Portal 2" (2011), Tenzin in "The Legend of Korra" (2012), Stanford Pines in "Gravity Falls", Kai in "Kung Fu Panda 3" (2016), Mayor Lionheart in "Zootopia" (2016) and Khampa in "Rock Dog" (2016).
 Simmons also reprised his role as J. Jonah Jameson in various Marvel animated series and video games.
 He has also appeared in a series of highly popular television commercials for Farmers Insurance.
Rambo: First Blood Part II (also known as Rambo II or First Blood II) is a 1985 American action film directed by George P. Cosmatos and starring Sylvester Stallone, who reprises his role as Vietnam veteran John Rambo.
 It is the sequel to the 1982 film "First Blood", and the second installment in the "Rambo" film series.
 Picking up where the first film left, the sequel is set in the context of the Vietnam War POW/MIA issue; it sees Rambo released from prison by federal order to document the possible existence of POWs in Vietnam, under the belief that he will find nothing, thus enabling the government to sweep the issue under the rug.
 In addition to Stallone, Richard Crenna reprises his role as Col. Samuel Trautman, with Charles Napier, Steven Berkoff, Julia Nickson, Martin Kove, George Cheung, and Andy Wood also included in the cast.
A persona (plural personae or personas), in the word's everyday usage, is a social role or a character played by an actor.
 The word is derived from Latin, where it originally referred to a theatrical mask.
 The Latin word probably derived from the Etruscan word "phersu", with the same meaning, and that from the Greek πρόσωπον ("prosōpon").
 Its meaning in the latter Roman period changed to indicate a "character" of a theatrical performance or court of law, when it became apparent that different individuals could assume the same role, and legal attributes such as rights, powers, and duties followed the role.
 The same individuals as actors could play different roles, each with its own legal attributes, sometimes even in the same court appearance.
 According to other sources, which also admit that the origin of the term is not completely clear, "persona" could possibly be related to the Latin verb "per-sonare", literally: "sounding through", with an obvious link to the above-mentioned theatrical mask.
Alberto De Martino (12 June 1929 – 2 June 2015) was an Italian film director and screenwriter.
 Born in Rome, De Martino started as a child actor and later returned to the cinema where worked as a screenwriter, director and dubbing supervisor.
 De Martino's films as a director specialised in wellcrafted knock-offs of Hollywood hit films.
 These films were specifically created films in Western, horror and mythology genres which were developed for the international market. "
The Telegraph" stated that his best known of these film was probably "The Antichrist".
 "The Antichrist" capitalized on the box-office appeal of "The Exorcist" (1973) and in its first week in the United States earned a greater box office than "Jaws".
 Horror film fans also remember him for "The Blancheville Monster", "Blood Link", "Formula for a Murder", "Medusa vs the Son of Hercules" and "Holocaust 2000".
Blood Link (Italian: "Extrasensorial" , German: "Blood Link - Blutspur" , also known as "The Link") is a 1982 Italian-American-German giallo-horror film written and directed by Alberto De Martino, and starring Michael Moriarty and Cameron Mitchell.
 The film was financed mostly by a German production company (Zadar Filmgesellschaft), but it was made by an Italian director and crew.
Gerald Raymond "Gerry" Rosenthal (born September 2, 1980) is an American actor, voice actor, singer-songwriter, and musician who started out acting in TV commercials at the age of 7.
 He has starred on films and short films and has guest starred in television series such as "Law & Order" and "Celebrity Deathmatch".
 He is perhaps best known for providing the voice for Jimmy Hopkins the main playable character in the 2006 video game "Bully" for which he was nominated for a 2006 Spike VGA award for best performance by a human male.
 He lives in Jersey City, New Jersey and now mostly works as a guitarist, bassist, keyboardist, and singer-songwriter.
 He teaches private music lessons and performs in gigs professionally.
 He plays bass in both a Beatles cover band called Hey Bulldog, as well as the Mama Doni Band, and guitar in a wedding band called The Jersey Joint.
 Gerry also writes, records, and plays guitar with his own original band, Big Wake.
 He freelances with as many different projects as possible, and performs solo and duo acoustic sets all over the area.
Michael Moriarty (born April 5, 1941) is an American-Canadian stage and screen actor and a jazz musician.
 He received an Emmy Award and Golden Globe Award for his first acting role on American television as a Nazi SS officer in the 1978 mini-series "Holocaust", and he played Executive Assistant District Attorney Benjamin Stone for the first four seasons (1990–1994) on the television show "Law & Order."
 Moriarty is also known for his roles in films such as "Bang the Drum Slowly", "Who'll Stop the Rain", "Q: The Winged Serpent", "The Stuff", "Pale Rider", "Troll", "Courage Under Fire", and "Shiloh".
Jill Tasker (born September 13, 1964) is an American actress.
 Tasker had starred as "Lou Malino" for nine episodes of the 1995-96 season, of The WB's, "The Wayans Bros." She also appeared in guest roles on "The Days and Nights of Molly Dodd", "Law & Order", "American Playhouse" and other shows.
 She starred with Joan Collins in the 1992 Broadway production of "Private Lives", playing the role of Sybil.
 Tasker earned a law degree in 2004 and currently works as a voiceover artist and personal coach.
 She is married to actor Doug Stender and resides in New York City.
Steven Boyer is an American stage and television actor, comedian, and musician.
 He is best known for originating the role of Jason/Tyrone in "Hand to God" Off-Broadway and in the Broadway production.
 This role earned him a Tony nomination for Best Leading Actor in a Play.
 He plays the role of Dwayne Reed in the NBC sitcom "Trial & Error", with John Lithgow.
 He played a minor role in Martin Scorsese's "The Wolf of Wall Street" alongside Leonardo DiCaprio.
 He has also played several small parts in television, including "The Good Wife", "Law & Order", and "Orange Is the New Black".
Matthew James "Matt" Morrison (born October 30, 1978) is an American actor, dancer, and singer-songwriter.
 Morrison is known for starring in multiple Broadway and Off-Broadway productions, including his portrayal of Link Larkin in "Hairspray" on Broadway, and for his role as Will Schuester on the Fox television show "Glee" (2009–2015).
 Morrison is signed with Adam Levine's 222 Records.
 Morrison received a Tony Award nomination for his featured role as Fabrizio Nacarelli in the musical "The Light in the Piazza."
 From March 2015 to January 2016, Morrison starred in the lead role of J.M. Barrie in the Broadway production of "Finding Neverland".