Question: One Night in Istanbul stars a British actor and recording artist who is best known for his portrayal of Jonah Kirby on what BBC One drama?

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Mark Letheren: Mark Vincent Letheren (born 6 February 1971) is an English actor possibly best known for his roles as journalist Simon Kitson in ITV's drama "The Bill", as Ben Harding in the BBC One drama "Casualty" and for his recurring role as DS Kevin Geoffries in "Wire in the Blood".

Richie Campbell (actor): Richard "Richie" Campbell (born 8 February 1982) is a British actor.  He grew up in North London.  He is best known for his comedic turn as local bully "Tyrone" in British film "Anuvahood" and his role of Ndale Kayuni in "Waterloo Road", which airs on BBC One.  Campbell has won a Screen Nation Award for his portrayal of Dominic Hardy in TV show "The Bill".  His work has included Breathless, Mid Morning Matters with Alan Partridge, and recurring roles in "The Silence" and Channel 4 drama "Top Boy".  As a film actor, Campbell has appeared in Wilderness, The Plague, The Firm, Victim, Fast Girls and Get Lucky.  In addition Campbell has done extensive work in West End theatre including, Dirty Butterfly at Young Vic theatre, Lower Ninth at the Donmar Warehouse, Truth and Reconciliation at Royal Court Theatre and in 2013 playing Tom Robinson alongside Robert Sean Leonard as Atticus Fitch in "To Kill A Mockingbird" at Regents Park Open Air Theatre.

Lucien Laviscount: Lucien Leon Laviscount (born 9 June 1992) is a British actor and recording artist best known for his portrayal of Jonah Kirby on popular BBC One drama "Waterloo Road".

Adam Rothenberg: Adam Rothenberg (born June 20, 1975) is an American actor, best known for his role as Capt. Homer Jackson in the BBC One drama mystery series "Ripper Street" (2012–16).  In film, he has starred in "Mad Money" (2008) as Bob Truman, "Tennessee" (2008) as Carter, and "The Immigrant" (2013) as Officer DeKeiffer.

William Beck (actor): William Beck is a Welsh-born actor, best known for his appearances on television in the United Kingdom as Royston White on BBC One drama series "Robin Hood", and Dylan Keogh on BBC One drama series "Casualty".  He has also appeared in popular feature films such as "Snatch", directed by Guy Ritchie.

Robert Kazinsky: Robert John Appleby, better known by the stage name Robert Kazinsky, is an English actor and model.  He is best known for his appearances as Casper Rose in the Sky One drama "Dream Team", Sean Slater in the BBC One soap opera "EastEnders", Chuck Hansen in "Pacific Rim", and Macklyn Warlow in the sixth season of HBO's "True Blood" in 2013.  In 2016, he played the orc warchief Orgrim Doomhammer in "Warcraft" and had the lead role in the U.S. Fox TV series "Second Chance".

Charlie Murphy (actress): Charlotte "Charlie" Murphy (born 19 April 1988) is an Irish actress.  She is best known for playing the lead role of Siobhan Delaney in the hit RTÉ drama "Love/Hate" for which she won the 2013 Irish Film and Television Award for Best TV Actress, and as Ann Gallagher in the acclaimed BBC One drama "Happy Valley".  She will next be appearing in the BBC One historical crime drama television series "Peaky Blinders".

Cel Spellman: Ceallach "Cel" Spellman ( ; born 31 August 1995) is an English actor and presenter known for playing Malky McConnell in the BBC Two mockumentary "The Cup", Harry Fisher in the BBC One drama "Waterloo Road" from 2010–11 and hosting "Friday Download" and the "CBBC Official Chart Show".  Since July 2015 he has presented his own show on BBC Radio 1 which airs Sunday afternoons between 16:00 and 19:00.  He also stars as Matthew Williams in "Cold Feet", and contributes to "The Voice UK".

One Night in Istanbul: One Night in Istanbul, also known as One Night in Istanbul: The Movie, is a British comedy-drama film, directed by James Marquand and produced/written by Nicky Allt.  The film stars Steven Waddington, Paul Barber, Lucien Laviscount, Samantha Womack, and Ingvar Eggert Sigurðsson.  It is based on the play of the same name by Nicky Allt.

Kelly Adams: Kelly Adams (born 16 October 1979) is an English actress, best known for her roles as Mickie Hendrie in the BBC One medical drama series "Holby City" (2004–2006) and "Casualty" (2005), as Emma Kennedy in the BBC One drama series "Hustle" (2009–2012), Padre Mary Greenstock in the BBC Three comedy drama series "Bluestone 42" (2013–2014) and Nancy Webb in the ITV period drama series "Mr Selfridge" (2015).

Supporting paragraphs: One Night in Istanbul Lucien Laviscount
Answer: Waterloo Road