Do Nothing till You Hear From Me (2004) was a six-part BBC Radio 4 sitcom written by British comic actor and writer Marcus Powell based on his Roy Diamond character.
 In the radio version, produced by Carole Smith, the cantankerous Jamaican stand-up comedian played by Powell was transformed into an equally cantankerous trombone player, Roy Walcott, played by Ram John Holder (of "Desmond's" and "Porkpie" fame).
 The stellar supporting cast included Sam Kelly (Porridge) George Layton, Yvonne Brewster, Caroline Lee Johnson ("Chef!
") and Marcus himself playing Roy's long-suffering son-in-law Victor.
David Hyde Pierce (born April 3, 1959) is an American actor, director, and comedian.
Martin "Marty" Crane is a fictional character on the American television show "Frasier".
 He was played by actor John Mahoney.
 An army veteran and retired police detective, he is the father of Frasier and Niles Crane.
Lilith Sternin (formerly Sternin-Crane) is a fictional character on the American television sitcoms "Cheers" and "Frasier", portrayed by Bebe Neuwirth.
 The character first appears as a date for Frasier Crane, though mutual hostility and discomfort causes the evening to end badly.
 Several months later, Lilith meets Frasier again and, with some help from Frasier's ex-fiancée, Diane Chambers (Shelley Long), they start a romantic relationship, eventually living together, marrying, and having a son, Frederick.
Frasier Winslow Crane is a fictional character on the American television sitcoms "Cheers" and "Frasier", portrayed by Kelsey Grammer.
 Grammer received award recognitions for portraying this character in these two shows, in addition to a 1992 one-time appearance in "Wings".
Niles Crane is a fictional character on the American sitcom "Frasier", a spin-off of the popular show "Cheers".
 He was portrayed by David Hyde Pierce.
 Niles is the younger brother of Dr. Frasier Crane, the son of Det. Martin Crane and Dr. Hester Crane, husband of Daphne Moon, ex-husband of Maris Crane and Dr. Melinda Karnofsky, former brother-in-law to Nanette Guzman and Dr. Lilith Sternin, and uncle to Frederick Crane.
Besides the main characters Frasier Crane, his father Martin and brother Niles, Daphne Moon, Roz Doyle, and a few others, there are several minor characters who regularly appear on the American television sitcom Frasier, or who have important but limited roles.
"Brother from Another Series" is the sixteenth episode of "The Simpsons"<nowiki>'</nowiki> eighth season.
 It originally aired on the Fox network in the United States on February 23, 1997.
 Sideshow Bob is released from prison into the care of his brother Cecil and claims to be a changed man.
 However, Bart does not believe him and tries to find out what Bob is up to.
 It was the first episode directed by Pete Michels and was written by Ken Keeler.
 The episode guest stars Kelsey Grammer in his sixth appearance as Sideshow Bob and David Hyde Pierce as Cecil.
 The title is not only a pun on the movie "The Brother from Another Planet" (used for a previous episode as well), but also a reference to the fact that guest stars Kelsey Grammer (Frasier Crane) and David Hyde Pierce (Niles Crane) also played bickering brothers on the NBC sitcom "Frasier".
Diane Chambers is a fictional character in the American television situation comedy show "Cheers", portrayed by Shelley Long and created by Glen and Les Charles.
 After her fiancé Sumner Sloan abandons her in the Cheers bar in the pilot episode, Diane works as a bar waitress.
 She has an on-off relationship with the womanizing bartender Sam Malone (Ted Danson) and a one-year relationship with Frasier Crane (Kelsey Grammer), who later becomes a main character of the series and "Frasier".
 When Long left the series during the fifth season, the producers wrote her character out.
 Since then, they added her permanent replacement Rebecca Howe, a businesswoman played by Kirstie Alley, in the sixth season.
 Shelley Long made a special guest appearance in the series finale as Diane.
 Long also appeared in "Frasier" as Diane's fantasy counterpart in Frasier's dreams and the actual Diane in a crossover episode "The Show Where Diane Comes Back".
Rozalinda (Roz) Doyle is a fictional character on the American television sitcom "Frasier".
 She is played by Peri Gilpin.
 Roz is the producer of Frasier Crane's "Dr. Frasier Crane Show" on KACL 780AM.
 Although initially reluctant to take the job, she and Frasier soon become good friends.

Question: Which American actor, director, and comedian played the character Niles Crane on Frasier?
Answer: David Hyde Pierce