J.R. Ewing will be killed off in a special episode of 'Dallas'.

The TV villain - played by the late Larry Hagman, who died of cancer in November - will take his final bow in a second 'Who Killed JR?' mystery special of the US drama.

A source told the Daily Mirror newspaper: ''We wanted Larry's legacy to remain beyond this show. We felt that one way would be to mirror the most memorable episode of all times. ''

The programme will echo the second most-watched TV episode of all time, 'Who Killed JR?', which drew in 83 million American viewers and 20 million Brits when it was first broadcast in the 80s.

Fans had waited seven months to discover who had shot evil oil baron J.R., and the new tribute episode will follow the same principle as viewers tune in to find out which of his enemies is responsible for his tragic exit.

Larry passed away aged 81 surrounded by his close friends and family, including his on-screen wife and life-long friend Linda Gray.

His family said at the time: ''Larry was back in his beloved 'Dallas', re-enacting the iconic role he loved most. Larry's family and close friends had joined him in Dallas for the Thanksgiving holiday.

''When he passed, he was surrounded by loved ones. It was a peaceful passing, just as he had wished for. The family requests privacy at this time.''

The TV special of the 'Dallas' reboot will air in March in the US and on Channel 5 later on this year.