To commemorate the show's demise, this week's Friday Fiver consists of our picks for the five greatest series finales of all time. Do you agree with our choices? Let us know in the comments section below. And be warned - there are big spoilers ahead!
Blake's 7 - 'Blake' (Aired December 21, 1981)
Come on, this one had to get a mention. After five years of battling the sinister Federation, Avon (Paul Darrow) and his team of rebels arrive on the planet Gauda Prime, only to find that they have stumbled directly into a trap. Convinced that he's been betrayed by former series lead Blake (Gareth Thomas), Avon shoots his old friend dead.
Moments later, Federation troopers storm the building, slaughtering the show's entire cast, save Avon, who is left standing over the bodies of his allies. With an enigmatic smile, Avon raises his gun and we cut to black - the sound of a hail of gunfire ringing over the final credits. A memorably bleak final episode.
The Shield - 'Family Meeting' (Aired November 25, 2008)
Another bleak finale, but what else did you expect from this superb FX cop drama? 'Family Meeting' saw poor Ronnie (David Rees Snell) take the flak for the Strike Team's years of corruption, while Shane (Walton Goggins) ended his own life, but not before taking his pregnant wife and young son with him.
But for series lead Vic Mackey (Michael Chiklis), there was a fate worse than death - robbed of all power and respect, the once feared Mackey is forced to take up a monotonous office job. Never has a man looked more uncomfortable in a suit and tie.
Six Feet Under - 'Everyone's Waiting' (Aired August 21, 2005)
Tragic, moving and just so right, the Six Feet Under finale was hailed as one of the greatest final episodes of all time. The instalment received five Emmy Award nominations and was lauded by critics.
You'd have to have a heart of stone not to feel at least a little moved as the departed Nate (Peter Krause) pays one last visit to the Fishers. The final flash-forwards - revealing how each member of the family passed away - are a perfect final touch.
The Office - 'The Christmas Specials' (Aired December 26 & 27, 2003)
The final two episodes of the UK Office were superbly structured. After an initial instalment that saw David Brent plunging to embarrassing new depths, Ricky Gervais and Steve Merchant ticked every single box in the last ever episode - Brent is redeemed, Finchy gets his comeuppance and Tim and Dawn finally get together.
Gervais has since insisted that he will never revisit the employees of Wernham-Hogg, and he's absolutely right in his decision. The Office had the perfect ending - leave it be.
Life On Mars - Series 2, Episode 8 (Aired Tuesday 10 April 2007)
Alright, so the real answers didn't arrive until the conclusion of spinoff series Ashes To Ashes three years later, but that aside, the writers of Life On Mars handled the finale in just the right manner.
Having spent so long wanting to return home, Sam Tyler (John Simm) finally gets his wish, but realises what the viewers knew all along - it's much more fun back in the '70s with Gene Hunt (Philip Glenister) and the gang! Sam ends his own life to return to the past, makes one last trip to the pub and gets called a "noncey-arsed fairy boy" by the Gene Genie as they speed away into the distance. Perfect.
Did we mention your favourite series finale? Let us know below!