Question: John Sackville had a role in what mystery television series on Nickelodeon?

Context paragraphs:
Agent Raghav – Crime Branch: Agent Raghav – Crime Branch is an Indian crime fiction anthology television series, which premiered on &TV, and was broadcast from 5 September 2015 to 10 April 2016 on Saturday and Sunday nights.  The series was produced by Contiloe Entertainment of Abhimanyu Singh and starred Sharad Kelkar in the eponymous role of Agent Raghav Sinha, along with Aahana Kumra, Deepali Pansare, Danish Pandor, Jason Tham and Mahesh Manjrekar, the latter appeared in a recurring role.  The serial received Indian Telly Awards in the category of "Best Thriller and Horror Show" and was also nominated for "Best Weekend Show".  The show is said to be inspired from the American police drama/mystery television series, "The Mentalist.

The Rivals of Sherlock Holmes (TV series): The Rivals of Sherlock Holmes is a British anthology mystery television series that was produced by Thames Television and originally broadcast on the ITV Network.  There were two series of 13 fifty-minute episodes; the first aired in 1971, the second in 1973.  The programme presented adaptations of short mystery, suspense or crime stories featuring, as the title suggests, detectives who were literary contemporaries of Arthur Conan Doyle's Sherlock Holmes.

Episode 4 (Twin Peaks): "Episode 4", also known as "The One-Armed Man", is the fifth episode of the first season of the American mystery television series "Twin Peaks".  The episode was written by Robert Engels, and directed by Tim Hunter.  "Episode 4" features series regulars Kyle MacLachlan, Piper Laurie and Richard Beymer, and introduces series co-creator David Lynch in the role of Gordon Cole.

Cadfael (TV series): Cadfael is a British mystery television series, broadcast on ITV between 1994 and 1998, based on "The Cadfael Chronicles" novels written by Ellis Peters.  Produced by ITV Central, it starred Derek Jacobi as the medieval detective and title character, Brother Cadfael.  The complete series was released on DVD on 24 August 2009.  The series aired in the United States as part of the Mystery!  series.

Marmadesam: Marmadesam (English:Land of Mystery) is a Tamil mystery television series directed by Naga and C. J. Bhaskar and all series story was written by Indra Soundar Rajan.  The series was originally telecasted between 1995 and 1998 on Sun TV and then on Raj TV between 1998 and 2001.  It is being re-telecast in Vasanth TV since 3 August 2015, Monday through Friday at 7:30PM.

Not Pictured: "Not Pictured" is the second season finale of the American mystery television series "Veronica Mars", serving as the twenty-second episode of the season and the forty-fourth episode overall.  Co-written by series creator Rob Thomas and John Enbom and directed by John Kretchmer, the episode premiered on UPN on May 9, 2006.

Tenafly (TV series): Tenafly is a crime-drama series starring James McEachin that was part of the "NBC Mystery Movie" wheel for the 1973-74 season.  It was created by Richard Levinson and William Link, the creators of popular mystery television shows such as "Columbo" and "Murder, She Wrote".  It was the one of the first television series that season to star an African-American character as the protagonist (the other show being "Shaft" with Richard Roundtree).  Due to low ratings, "Tenafly" only lasted one season.

House of Anubis: House of Anubis is a mystery television series developed for Nickelodeon based on the Dutch-Belgian television series "Het Huis Anubis".  The series was created by Hans Bourlon and Gert Verhulst and premiered on Nickelodeon on 1 January 2011 in the United States and on 25 February 2011 in the United Kingdom.  The series is the first series from the network to be filmed outside the United States and the first telenovela-format series for the network.  The show aired from 1 January 2011 to 17 June 2013.

John Sackville (actor): John Sackville is an English actor, best known for his role as the villainous Robert Frobisher Smythe in the US TV series "House of Anubis."  He has worked in theatre, film and television.

The Mystery Files of Shelby Woo: The Mystery Files of Shelby Woo is a Canadian-American children's mystery television series that ran on Nickelodeon between 1996 and 1998.  A total of 41 episodes of 30 minutes each were produced.  Episodes from the first three seasons were taped at the now defunct Nickelodeon Studios in Orlando, Florida, and was one of the few single-camera productions there, while season 4 episodes were shot in Montreal, Quebec, Canada.

Supporting paragraphs: John Sackville (actor) House of Anubis
Answer: House of Anubis