Glyn Stott, a Simpsons fan, is attempting to set a world record by watching all 451 episodes of the cartoon comedy back to back.
To celebrate the 20th anniversary of his favourite television show, Mr Stott plans to endure more than 150 hours of sleep deprivation to view its entire back catalogue.
If he can stay awake to see every episode shown in Britain since its launch in Britain in January 1990, the 34-year-old will earn a place in the Guinness Book of Records.
His six day feat will be overseen by officials to ensure he does not fall asleep.
Mr Stott, from Merthyr Tydfil, South Wales, said: "I'm a huge fan of the show and I've seen every episode but watching them continuously for almost a week will be a feat of endurance.
"The judges have to make sure my eyes are firmly fixed on the screen – I have to be seen to be concentrating all the way through."
The current record for non-stop television watching is four days, set by an American viewer.
But Mr Stott believes his adoration of the show's characters Homer, Marge, Bart, Lisa and Maggie, will help him smash the record.
The Welshman's home is a shrine to the American cartoon family and he has spent up to £100,000 (€113,000) on Simpsons merchandise.
His horde of memorabilia includes everything from cufflinks to life-size models and a Simpsons doughnut maker.
His original Simpsons toys are worth up to £1,500 (€1,699) each in mint condition in their boxes.
Mr Stott, a shop manager, added: "To start with I wasn't sure, I couldn't understand why the characters were yellow – it was all a bit strange.
"But I soon fell in love with the show and I watch it every day – sometimes twice.
"The Simpsons are a major part of my life and I've got the T-shirt, the wristwatch, and the figurines to prove it.
"But my love of the show will be tested if I can stay awake for almost a week watching every episode and the feature film on top."
Mr Stott will get a 20-minute break at the end of every three episodes and he must stick to the strict rules laid down by Guinness.
He said: "If I have a meal during the world record attempt I'm not allowed to look down at the plate – my eyes must be on the TV all the time.
"I will be allowed to use an exercise bike to keep my circulation going but even then I can't avert my eyes from the Simpsons."
Fox Broadcasting Company, for which The Simpsons is produced, is backing Mr Stott's world record attempt by sending him every episode on DVD.
He said: "I've got them all on video anyway but it will make it easier to watch them constantly.
"I will be watching 20 years of TV compressed into six-and-a-half days – it will be amazing to see how the show has changed over the years."
A spokesman for Fox said: "Nearly a week without sleep watching TV – Homer would be proud of him."