Matthew King is a fictional character from the British ITV soap opera Emmerdale, played by Matt Healy. He made his first screen appearance during the episode broadcast on 4 March 2004. Matthew arrived as part of the King family, a family of successful businessmen. During his time on the show, Matthew had relationships with several women and was engaged to Anna De Souza when he died. Matthew's last appearance was on 16 December 2008.

Carl Thomas King is a fictional character from the British ITV soap opera Emmerdale, played by Tom Lister. The character and casting were announced in January 2004 when it was announced that producers were bringing "four new single 'hunks'" into the show, one of them being Carl. Lister made his first appearance on the show on 6 February 2004. Throughout the course of his story arc, Carl establishes a relationship with Chas Dingle – which contributes to his storylines that include the pair having an ill-fated wedding after Chas exposes Carl's affair with her best friend Eve Jenson. During his time on the show, Carl has accidentally caused the death of local postman Paul Marsden ; killed his own father Tom in the events surrounding the Who Killed Tom King? storyline, which he ultimately confessed to his brothers Jimmy and Matthew on the show's 500th village anniversary episode – after the trio were acquitted for their father's murder; formed a romance with DCI Grace Barraclough, the policewoman investigating his father's murder, that culminated with her being killed in a hit and run – just as she prepared to take Carl into custody after he admitted to killing his father; sparked a business conflict with Matthew that concluded with the latter's death, after Carl ruined Matthew's ill-fated wedding to his business partner Anna De Souza by exposing his involvement behind the death of her father Donald ; developed a feud with Chas' niece Debbie upon clashing with her parents, Cain and Charity, respectively; embarked on a failed marriage with Lexi Nicholls ; and became archenemies with Debbie's ex-boyfriend Cameron Murray after discovering his affair with Chas and subsequently blackmailing the pair in repaying him the £30,000 that Chas previously swindled from his bank account.