John Jacob "Jack" Sugden is a fictional character from the British ITV soap opera Emmerdale. The character was originally played by Andrew Burt from 1972 to 1973 with a brief return in 1976, when the actor left for Italy to write a book. On his return in 1980 he was played by Clive Hornby. Hornby remained in the role until 2008 when he was forced to take a break from Emmerdale due to illness. His last on-screen appearance was on 21 February 2008, and his absence was explained by the character visiting his mother, Annie Sugden in Spain. Although Hornby was intended to return, he died from his illness in July 2008 without returning to the programme. Jack was written out following Hornby's death, dying off-screen of a heart attack in February 2009.

Emmerdale is a British television soap opera that is broadcast on ITV. The show is set in Emmerdale, a fictional village in the Yorkshire Dales. Created by Kevin Laffan, Emmerdale Farm was first broadcast on 16 October 1972. Interior scenes have been filmed at the Leeds Studios since its inception. Exterior scenes were first filmed in Arncliffe in Littondale, and the series may have taken its name from Amerdale, an ancient name of Littondale. Exterior scenes were later shot at Esholt, but are now shot at a purpose-built set on the Harewood estate.