Seth is a fictional character from the British

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comedy-drama '' Misfits'', portrayed by Matthew McNulty. Seth first appears in the Christmas special as a guest character. McNulty knew it was a possibility he may be brought back but did not know for definite until a month before he began filming series three. McNulty explained that Seth is a " plot tool" and is a used by the writers to help continue changing the show through his ability to deal powers, moving them to and from others which was born out of Seth's job as a drug dealer. The character "has to be a bit ruthless at times" but is a "nice guy" who "wants to do the right thing". McNulty explained Seth is "a level-headed, straight thinking guy" and helps the group when things "get a little too far out of hand", driving the situation towards the right resolution "because he’s pretty much a strait-laced character".

Casting and character creation

Matthew McNulty was first cast as Seth to appear in the Christmas special. McNulty reprised his role as Seth throughout the third series which he said was always an option but was never a definite. He was only informed that he would be returning a month before filming began. McNulty explained that Seth is a " plot tool" and is a "useful tool" for the writers to help continue changing the show due to his ability to change the powers of other characters.

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's Morgan Jeffrey confirmed Seth would appear in the fourth series.

Characterisation and development

McNulty said the audience are initially lead to "sort of think" that Seth is "not a very nice guy" but as the series progresses "you get to know Seth a little bit more ..and you can kind of get a little bit of an understanding of why he is like he is and I think people will warm to him a little bit more". He explained that Seth was in a long term relationship until his girlfriend died which makes him "a bit needy".