Billy Howard is an English comedy impressionist, who appeared on the ITV series "Who Do You Do", alongside other impressionists such as Faith Brown.
 In 1976, his single, "King Of The Cops", a send-up of the hit "King of the Road", reached #6 in the UK Singles Chart; it featured his impressions of TV cops including Kojak, Columbo, Steve McGarrett in Hawaii Five-O, McCloud, Ironside and Cannon.
 A follow-up was also released: "The Disco Cops".
John Joseph Patrick Ryan (December 30, 1920 – January 21, 1998), best known by his stage name, Jack Lord, was an American television, film and Broadway actor and director and producer.
 He was known for his starring role as Steve McGarrett in the CBS television program "Hawaii Five-O", which ran from 1968 to 1980.
Clark Brandon (born December 13, 1958) is an American actor.
 His most notable roles were as Max Merlin's apprentice Zachary Rogers in the CBS series "Mr. Merlin" and as Sean Fitzpatrick, the older brother, in the CBS series "The Fitzpatricks".
 He also starred with Jim Varney in the 1989 comedy film, "Fast Food".
Hawaii Five-O is a police procedural television series created by Leonard Freeman for the CBS television network.
 Starring Jack Lord, the series premiered on September 20, 1968, and ended after twelve seasons on April 4, 1980, during which time 279 episodes were produced and broadcast.
 The series covers a special state task force for the state of Hawaii led by Detective Steve McGarrett (Jack Lord).
The Ride to Hangman's Tree is a 1967 American Western film directed by Alan Rafkin and written by Luci Ward, Jack Natteford and William Bowers.
 The film stars Jack Lord, Melodie Johnson, James Farentino, Don Galloway, Richard Anderson and Ed Peck.
 The film was released in May 1967, by Universal Pictures.
Alex O'Loughlin (born 24 August 1976) is an Australian actor, who plays Lieutenant Commander Steve McGarrett on CBS' remake of the TV series "Hawaii Five-0".
 He had starring roles in the films "Oyster Farmer" (2004) and "The Back-up Plan" (2010), as well as on such television series as "Moonlight" (2008) and "Three Rivers" (2009).
Steve McGarrett is a fictional character from "Hawaii Five-O" who serves as the leader of the Hawaii Five-0 (5−0) crime task force.
 McGarrett was originally played by Jack Lord and also by Alex O'Loughlin in the remake.
 He is partner to Detective Danny "Danno" Williams.
Denzel Washington is an American actor who made his feature film debut in "Carbon Copy" (1981).
 In 1982, Washington made his first appearance in the medical drama "St. Elsewhere" as Dr. Philip Chandler.
 The role proved to be the breakthrough in his career.
 He starred as Private First Class Melvin Peterson in the drama "A Soldier's Story" (1984).
 The film was an adaptation of the Off-Broadway play "A Soldier's Play" (1981–1983) in which Washington had earlier portrayed the same character.
 In 1987, he played Steve Biko, an anti-apartheid activist in the Richard Attenborough-directed drama "Cry Freedom", for which he received his first nomination for the Academy Award for Best Supporting Actor.
 Two years later, Washington won the award for playing Trip, a former slave-turned-soldier in Civil War film "Glory" (1989).
 In 1990, he played the title character in the play "The Tragedy of Richard III", and starred in Spike Lee's comedy-drama "Mo' Better Blues".
 Washington received the Silver Bear for Best Actor at the Berlin International Film Festival, for playing the eponymous civil rights activist in Lee's "Malcolm X" (1992).
William Thomas Sadler (born April 13, 1950) is an American film and television actor.
 His television and motion picture roles have included Lewis Burwell "Chesty" Puller in "The Pacific", in "", Sheriff Jim Valenti in "Roswell", convict Heywood in "The Shawshank Redemption", Senator Vernon Trent in "Hard To Kill", and the Grim Reaper in "Bill & Ted's Bogus Journey", a role for which he won the Saturn Award for Best Supporting Actor, and his role as Colonel Stuart opposite Bruce Willis in "Die Hard 2".
 He played the character of President of the United States, Matthew Ellis, in "Iron Man 3", in "Marvel's Agents of S.H.I.E.L.D.", and in "WHIH Newsfront", and recurs as Steve McGarrett's murdered father in the latter-day 2000's remake of "Hawaii Five-O".
 In 2015, Sadler had an appearance in the TV series "Z Nation".
Wo Fat is the name of a fictional villain in the long-running CBS series "Hawaii Five-O".
 On the show, Wo Fat is the nemesis of Steve McGarrett (Jack Lord and Alex O'Loughlin), the head of Hawaii's (fictional) special task force, Five-O.

Question: The Ride to Hangman's Tree starred the actor who played Steve McGarrett in what CBS series?
Answer: Hawaii Five-O