Question: Which English actress was introduced in an episode of Jonathan Creek?

Context paragraphs:
Sarah Alexander: Sarah Alexander (née Smith; born 3 January 1971) is an English actress.  She is best known for her roles in British series such as "Armstrong and Miller", "Smack the Pony", "Coupling", "The Worst Week of My Life", "Green Wing", "Marley's Ghosts" and "Jonathan Creek".

Sheridan Smith: Sheridan Smith, OBE (born 25 June 1981) is an English actress, singer and dancer.

The Grinning Man: "The Grinning Man" is a feature-length episode of the BBC crime drama series "Jonathan Creek", first broadcast on 1 January 2009.  The episode marked the series' return to television following a five-year hiatus, and saw the return of Alan Davies as the show's titular sleuth.  Stuart Milligan returned to the series as Jonathan's boss, magician Adam Klaus, while the episode also introduced Sheridan Smith as Joey Ross, Jonathan's crime-solving assistant.  The episode was written and directed by series creator David Renwick, who chose to revive the show as a means of delaying his retirement.

The Judas Tree (Jonathan Creek): "The Judas Tree" is the twenty-seventh episode of the British crime drama series "Jonathan Creek".  The feature-length episode was written and directed by series creator David Renwick, and premiered on BBC One on 4 April 2010.  The episode focuses on a series of mysteries surrounding housekeeper Emily Somerton (Natalie Walter), including a vanishing house and the murder of her employer Harriet Dore (Sasha Behar).  Alan Davies returns as the series' titular sleuth, Jonathan Creek, while Sheridan Smith reprises her role as his assistant Joey Ross, and Stuart Milligan returns as Jonathan's boss, magician Adam Klaus.

Cavan Clerkin: Cavan Clerkin (born 28 November 1973) is a British television actor and writer.  He has appeared in comedy shows including "Pulling", "The Inbetweeners", "Smack the Pony", "The IT Crowd", "Jonathan Creek" and "Look Around You".  He also appeared in the films "Gangster No 1", "Spivs" and "Pierrepoint".  He has written for "Smack the Pony", and co-created the comedy series "Los Dos Bros", in which he also starred.  In 2009, he appeared in the soap opera "EastEnders" as Joel Reynolds.  and in 2011 he appeared as Leonard Glickman in "The Shadow Line".  He wrote, produced and starred in British Independent feature film ""Nice Guy""and in 2014 played DCI Gerring in ITV drama "Lucan" and Clarkey in Channel 4's police satire "Babylon".  That year he also appeared in episode 4 of the BBC sitcom "Count Arthur Strong".  In 2016, he is currently playing "Vinnie", a talent manager, in Morgana Robinson's, "The Agency".

Caroline Quentin: Caroline Quentin (born Caroline Jones; 11 July 1960) is an English actress.  Quentin became known for her television appearances: portraying Dorothy in "Men Behaving Badly" (1992–1998), Maddie Magellan in "Jonathan Creek" (1997–2000), and DCI Janine Lewis in "Blue Murder" (2003–2009).

Jonathan Creek (New Brunswick): Jonathan Creek is a tributary of the Petitcodiac River in New Brunswick.  The creek's watershed area is around 50 km².  The majority of Jonathan Creek flows through the city of Moncton, eventually joining Jones Lake.  Because of its close proximity to commercial and residential areas, water run off and bank erosion have impacted the condition of Jonathan Creek.  In 2003, city of Moncton pleaded guilty to environmental charges regarding leachate from an out of service landfill being found in Jonathan Creek.

Alan Davies: Alan Roger Davies ( ; born 6 March 1966) is an English stand-up comedian, writer and actor.  He has played the title role in the BBC mystery drama series "Jonathan Creek" since 1997.  He has been a permanent panellist on the BBC panel show "QI" from 2003, only missing one episode in the D series because he did not want to miss his favourite football team, Arsenal, playing in the Champions League final the evening of recording.  He did however make an appearance through pre-recorded material, which ended with him being 'teleported' to the match as he tested his buzzer.

Tuscola–Pisgah rivalry: The Tuscola-Pisgah rivalry, also referred to as the Pisgah-Tuscola Rivalry, the Haywood County Championship Game, the Iron Bowl, the Battle for Haywood, the Paper Bowl, and the County Clash is one of the best known and fiercest high school football rivalries in the southeastern United States.  It has also been named the best high school rivalry in the state of North Carolina by USA TODAY.  It typically draws between 10,000 and 15,000 fans per year.  The intensity of the rivalry is caused by the fact that these are the only two high school football teams in Haywood County, North Carolina and are located less than 9 miles apart.  Tuscola High School is located on a hill in Waynesville, NC that houses students from the western part of the county, primarily Waynesville, Maggie Valley, Crabtree, Fines Creek, Jonathan Creek, and western portions of Clyde.  Pisgah High School is located on the banks of the Pigeon River in Canton, NC and houses students from the eastern part of the county, primarily Canton, Beaverdam, Bethel, Cruso, and eastern Clyde.

Jason Tompkins: Jason Tompkins is a British actor and dwarf.  He is most famous for his role as Robert Greenspan, one of the main characters in the dark comedy series "Psychoville".  He also had a notable role in an episode of "Jonathan Creek", as well as a minor role in an episode of "The 10th Kingdom".

Supporting paragraphs: The Grinning Man Sheridan Smith
Answer: Sheridan Smith