A gardener due to feature on TV home makeover show DIY SOS with his wife has been found dead after apparently holding her hostage inside their home.
Jenny Walters, 41, had called police to report she was being held prisoner by husband Mark, 48, at their house in Bushey Mill Lane, Watford, on Sunday.
Mrs Walters managed to leave but when police arrived they found the father-of-three dead with a gun.
The couple were due to feature on the BBC One show on Bank Holiday Monday.
A BBC spokesperson said the episode would not be broadcast.
A Hertfordshire Constabulary spokeswoman said officers had been warned Mr Walters had a firearm but the incident was not being treated as suspicious.
Police arrived at the house early on Sunday morning to investigate an allegation of false imprisonment, she said.
"When officers entered the property they found a man in his late forties had passed away," a spokeswoman said.
"Officers are investigating the circumstances of the death, however at this stage it is not being treated as suspicious."
Police were waiting for the results of a post-mortem examination to confirm the cause of death, the spokeswoman added.
A BBC spokesperson confirmed the couple had been filmed for the TV makeover programme, presented by Nick Knowles.
"Following the tragic news of the death of a DIY SOS contributor, the episode will not be broadcast. Our thoughts are with his family," the spokesperson said.
Work carried out on the couple's semi-detached home was believed to have included a new kitchen and filming had taken place last June.