More than 20 years after they first appeared on television Homer, Marge, Bart, Lisa, and Maggie are finally available on iTunes but only in the US.

The Simpsons, Season 20 is available now on iTunes for $37.99 although not in high definition.

Previous seasons, including many considered to be The Simpsons at their creative peak, have yet to be released on iTunes.

The Simpsons' Season 20 began airing on Fox in the US on 28 September this year and includes an Apple parody in ‘Mypods and Boomsticks.’

The Simpsons visit Springfield’s new Mapple store full of MyPods, MyPhones and MyCubes, while Steve Mobs, evidently modelled on Apple CEO Steve Jobs makes an appearance.

The Simpsons is now tied with Gunsmoke as the longest running American primetime television series.

As yet there is no sign if, and when, The Simpsons will make an appearance on the UK iTunes store.

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