Career criminal Eddie Hutch walked away from Winning Streak with €33,000 in cash and prizes after his younger brother appeared for him on the RTE show
The convicted criminal, who has 189 previous convictions for crimes including theft and car break-ins, will celebrate taking home one of the highest windfalls from Saturday night's show.
Eddie Hutch, who is a nephew of former crime boss Gerry 'The Monk' Hutch, asked his younger brother to take his place on the show.
Ross Hutch, who has 54 convictions to his name, did not get to spin the wheel but celebrated with his young daughter, the pair dancing on set as the credits rolled.
The father-of-two managed to win cash prizes totalling €8,000 and a car worth €25,000, though Eddie was handed a decade-long driving ban in 2009.
Chatting on the show with co-host Sinead Kennedy, Ross jokingly told her she was "all right", leaving the presenter flustered as she asked him about his hobbies and future plans.
He told her he spent his spare time in the gym and harboured dreams of becoming a taxi driver.
He also said there had been great excitement all week in the build-up to the show after his brother's ticket was drawn out to appear.
Family members joined Eddie in the audience.
Contestants on the show included Miss Donegal Natasha McFadden, who said she would not be put off by the appearance of Hutch as she was looking forward to winning as much as possible.
Ross, who is in his early 20s and from Dublin north inner city, has also had several run-ins with the law.
He has convictions for assault, dangerous driving and endangerment, robbery, violent disorder and other offences.
In 2012 he was found in possession of a sawn-off shotgun which he was storing in a shopping bag.
He was stopped by a garda on Sean McDermott Street in the city and fled the scene but was caught nearby.
In 2013 he was handed a three-year suspended sentence for the incident, and the presiding judge congratulated him on having kicked his drug habit.
Meanwhile, his brother made headlines earlier this year when he was found not guilty by reason of insanity for assaulting a prison guard in 2012.
A consultant psychiatrist said Eddie Hutch believed his uncle and father were trying to turn him into a woman.