In July 2012, a storyline began in the British soap opera "EastEnders" in which the character Kat Moon, played by Jessie Wallace, embarks on an affair behind her husband Alfie Moon's (Shane Richie) back, with an unknown person.
 The suspects named were Ray Dixon (Chucky Venn), Michael Moon (Steve John Shepherd), Max Branning (Jake Wood), Derek Branning (Jamie Foreman) and Jack Branning (Scott Maslen).
 Ray was the first suspect to be eliminated, on 7 August, followed by Michael on 14 September.
 The mystery man was revealed as Derek in the 20 December episode.
 Richie dubbed the storyline "Who's Been Sleeping with Kat?"
, while critics referred to it is "the who-copped-off-with-Kat saga", "Who Banged Kat?"
 and the "Kat Mystery Lover storyline".
Abigail "Abi" Branning is a fictional character from the BBC soap opera "EastEnders", played by Lorna Fitzgerald.
 She was introduced by executive producer Kate Harwood on 3 July 2006 as an extension to the Branning family, along with father Max (Jake Wood), mother Tanya Branning (Jo Joyner) and older sister Lauren Branning (Madeline Duggan, later played by Jacqueline Jossa).
 In September 2017, it was announced that Fitzgerald and Jossa had been axed by creative director John Yorke, with Abi and Lauren set to depart at Christmas.
Veronica Elizabeth "Ronnie" Branning (also Mitchell) is a fictional character from the BBC soap opera, "EastEnders", played by Samantha Womack.
 She and her sister Roxy Mitchell (played by Rita Simons) were introduced by executive producer Diederick Santer in July 2007.
 Ronnie is the "ice" to Roxy's "fire".
 As an extension to the already established Mitchell family, Ronnie quickly became a prominent character, taking over the nightclub.
 Not long after that, she formed a relationship with her business partner, Jack Branning (Scott Maslen).
The following is a list of characters that first appeared in the BBC soap opera "EastEnders" in 2007, by order of first appearance.
 A new family were introduced in this year, with Zainab Masood, Masood Ahmed, Shabnam Masood and Tamwar Masood creating the Masood clan.
 Heather Trott was introduced, and the Mitchell family was extended, with Ronnie Mitchell and Roxy Mitchell as a fiery new double act.
 August saw the arrival of Tanya Branning's drug-addicted sister Rainie Cross.
 Scott Maslen joined the soap opera as Jack Branning in October, and his nephew Oscar Branning was born in December.
Jack Branning is a fictional character from the BBC soap opera "EastEnders", played by Scott Maslen.
 He made his first appearance on 29 October 2007.
 He is the youngest child of Jim and Reenie Branning and the brother of April Branning, Carol Jackson, Derek Branning, Suzy Branning and Max Branning.
 The character was introduced to the show during a period when "EastEnders" was being routinely criticised in the media for its reliance on resurrecting old characters.
 The casting of Scott Maslen provoked some controversy, being the first time an actor had been poached from one mainstream soap to another.
 It was quickly established that Jack is a morally ambiguous character, with a murky past in the police force resulting in the paralysis of his young daughter.
 Tabloid media have praised the character for his role as resident Romeo, commenting frequently on his good looks and attractiveness, although broadsheet press have been more critical of Maslen's acting.
Carl White is a fictional character from the BBC soap opera "EastEnders", played by Daniel Coonan.
 He first appears in the 4660th episode, originally broadcast in the United Kingdom on 20 June 2013.
 Carl is the ex-boyfriend of Kirsty Branning (Kierston Wareing), and his storylines include tracking down cash owed to him by Derek Branning (Jamie Foreman), which Ian Beale (Adam Woodyatt) has used to open a restaurant, trying to win Kirsty back, a relationship with Roxy Mitchell (Rita Simons) and feuds with Max Branning (Jake Wood), Phil Mitchell (Steve McFadden) and Ronnie Mitchell (Samantha Womack), who kills him.
 He is a villainous character, who has been called "manipulative", "unpredictable", "nasty" and "scary", though Jim Shelley from the "Daily Mail" called him "a fairly undistinguished presence".
 The character was axed in September 2013 and departed in the episode first broadcast in the UK on 1 January 2014, a joint broadcast of episodes 4775 and 4776, after being killed by Ronnie.
Maxwell "Max" Branning is a fictional character from the BBC soap opera "EastEnders", played by Jake Wood.
 He made his first appearance on 27 June 2006.
 Wood took a four-month break from the show in 2011 and the character was absent between August and November 2011.
 Wood took a second break from the show in 2015, this time for a year.
 Max departed on 1 October 2015.
 Max returned for one episode on 9 June 2016 and returned permanently on 24 December 2016.
Dorothy "Dot" Branning (also Cotton) is a fictional character from the BBC soap opera, "EastEnders", played by June Brown since 1985.
 Dot first appeared in "EastEnders" in July 1985 as the mother of criminal Nick Cotton (John Altman).
 The character has worked as a launderette assistant for most of that time along with original character Pauline Fowler (Wendy Richard).
 Dot moved away with her son and his family in 1993.
 In reality, Brown left the show in 1993, unhappy with the axing of her co star Peter Dean, who played Pete Beale from the shows first episode to early 1993.
 Brown returned to the role in 1997, and Dot was shown moving back to Albert Square, and has continued since that time.
 On 28 April 2017, Dot overtook Pat Butcher (Pam St. Clement) as the second longest-serving character in "EastEnders", surpassed only by original character Ian Beale (Adam Woodyatt).
 In a special episode entitled "EastEnders: Dot's Story" (2003) a young Dot was played by Tallulah Pitt-Brown in flashbacks.
 In April 2012, Brown took a six-month break from the show to write her memoirs.
 Dot temporarily departed on 18 May 2012.
 She returned on 14 January 2013.
 In February 2015, Dot began appearing less frequently due to Brown gradually losing her eyesight; this aspect of her life was later written into her character the following year.
 In January 2016, it was announced that Brown had renewed her contract with the BBC until March 2017.
 Brown is now the oldest soap opera actress in Britain.
 In January 2017 it was reported that the BBC were offering Brown £300,000 for a one-year contract.
The following is a list of characters that first appeared in the BBC soap opera "EastEnders" in 2006, by order of first appearance.
 2006 was a year when many families joined "EastEnders".
 First, Deano Wicks, his sister Carly Wicks and father Kevin Wicks joined.
 Then, the Fox family appeared, with the characters of Denise Fox, Chelsea Fox and Libby Fox as members.
 The Branning family was extended with Max Branning, Tanya Branning, Abi Branning and Lauren Branning all joining.
 Also, May Wright, Jay Brown and Shirley Carter, the biological mother of Deano and Carly, all joined the show.
 Also, Owen Turner, Denise's abusive ex-husband, and his mother Liz both arrived in this year.
The following is a list of characters that first appeared in the BBC soap opera "EastEnders" in 2008, by order of first appearance.
 All characters were introduced by executive producer Diederick Santer.
 Santer introduced four characters in January, Mr Lister, a new market inspector; Christian Clarke, the brother of Jane Beale and two members of the Branning family, Selina and Penny.
 In March, he introduced Jalil Iqbal, a new love interest for Shabnam Masood and in April he introduced Ricky Butcher's fiancée, Melinda as well as Bianca Jackson's children, Whitney, Morgan and Tiffany.
 Also in April he introduced Denise Fox's ex-husband, Lucas Johnson, and Opal Smith, the aunt of Gus and Juley Smith.
 In May he extended the Johnson family and introduced Lucas's son, Jordan as well as introducing Brenda Boyle, a new love interest for Charlie Slater.
 In July, he introduced two members of the long-established Mitchell family, Archie Mitchell and Danielle Jones.
 In August, he introduced Callum Monks, the son of Vinnie and in September, Tony King, arrived as the partner of Bianca, and Poppy Merritt, the new GP of Walford.
 November saw the only birth of the year, Amy Mitchell, the child of Roxy Mitchell and Jack Branning.
 The final introduction of the year was Dotty, Nick Cotton's daughter.

Question: As the youngest brother to a fictional character from the BBC soap opera "EastEnders", Jack Branning is played by what actor?
Answer: Scott Maslen