4/4. Nihal reveals the No 1 of the Noughties.

Lily Allen's special performance at BBC Radio 1's Big Weekend in Swindon, back in May.

Fearne's here with two hours of great music including the best from Radio 1's Live Lounge.

Dev helps you through that strange gap between Christmas and New Year!

Rob presents a special A to Z of Hip Hop. This programme contains strong language.

Seani B is in the mix.

Another chance to hear Greg Wilson's Essential Mix from earlier this year.

Stay up late and enjoy a Da Bank Double Decker from earlier this year.

Robbie Williams at the BBC Electric Proms in October. Contains strong language.

Westwood takes over Radio 1 and 1Xtra simultaneously!

3/4. Nihal reveals more of the UK's Official Top 100 bestselling singles of the Noughties.

Enjoy it again or experience it for the first time, just don't miss it.

Fearne's here with two hours of great music including the best from Radio 1's Live Lounge.

Dev helps you through that strange gap between Christmas and New Year!

Rewinding to January, High Contrast presents his A to Z of music.

1Xtra's Seani B mixes you through two hours of good music

Hear what happened when Toddla T took over Radio 1's Essential Mix earlier this year.

Stay up late and enjoy a Daa Bank Double Decker from earlier this year.

Muse's triumphal return to their home town of Teignmouth in Devon.

Westwood takes over Radio 1 and 1Xtra simultaneously!

2/4. Nihal starts his countdown of the UK's Official Top 100 bestselling singles of the decade.

An intimate performance by Arctic Monkeys, recorded live for Zane Lowe.

Fearne's here with two hours of great music including the best from Radio 1's Live Lounge.

Dev helps you through that strange gap between Christmas and New Year!

Rewinding to June, Rusko presents his dubstep Top 40.

Seani B is in the mix.

Listen again to Sub Focus' special Essential Mix from earlier this year.

Two back to back one-hour mixes, featuring Martyn vs TRG.

Live Lounge highlights from Kasabian, JLS, Biffy Clyro, Dizzee Rascal and Jay-Z.

Westwood takes over Radio 1 and 1Xtra simultaneously!

1/4. Nihal is here with the decade's best selling albums. See how many are in your collection!

We head off to Hampden Park in Glasgow for another chance to hear Coldplay in concert.

Fearne's here with two hours of great music including the best from Radio 1's Live Lounge.

Dev helps you through that strange gap between Christmas and New Year!

Rewinding to March, Andy C presents his drum and bass Top 40.

Seani B is in the mix.

Another chance to hear Switch and Diplo's Essential Mix from earlier in the year.

Aled is joined by Dr Aaron Balick to help you through your festive stresses.

Annie and Nick rewind to London's Hammersmith Apollo for November's Switch Live.

Dev sits in for Reggie to count down the new official Top 40.

JLS round off an amazing year with their very own show on Radio 1.

Max sits in for Edith Bowman to kick start your Sunday.

Join Ras for a three-hour special featuring his highlights of the year.

See how many of the 538 tracks in Jaguar Skills' special mix you can identify in one hour!

Catch Zane and Westwood's countdown of the game's Top 30 Most Hip Hop people.

The highlights from 1Xtra Live in Sheffield keep coming.

Live music highlights from Dizzee Rascal, Jay Sean, Tinchy Stryder and many more.

Relive some of the highlights from Radio 1's own music festival.

Glitz and glamour abound with the best of Vernon's guests of 2009.

Max sits in for Edith Bowman with all you need to kick start Boxing Day.

The votes are in and the listeners have spoken - the Essential Mix of 2009 is from Sharam.

The decks are cleared for another Essential Mix.

10/10. Radio 1's story of the decade concludes with a look back at the year just gone.

9/10. 2008 - Jay-Z headlines Glastonbury and Barack Obama is elected US president.

8/10. Remember 2007? It was all about downloads, rehab and The Mighty Boosh.

7/10. Nu Rave arrived, Ibiza rocked and Lily Allen led the girls back into the charts.

6/6. Dr Shahir Shamsuddin, Suzie Owens, David Elton and George Couper conclude the takeover.

5/6. Will Wade, Robin Morgan, Cath Bore and Matthew Dunleavy are your hosts for this hour.

4/6. We continue with Craig Sharp, Richard Good, Jamie Clews and Polly Farrington.

3/6. Glenn Atkins, Tom Errington, Michelle Miller and Jude Churcher are the next four.

2/6. Neil Phipps, Ross McMahon, Dan Carnelly and Christina Tatlow each get their 15 minutes!

1/6. Listeners Andrew Frenzel, Kimberley Boak, James Briers and Libby Ainsworth start it off.

Greg comes live from under the Radio 1 Christmas tree.

Ras is joined by Toddla T, Ms Dynamite and others for a Christmas special.

A variety box of classics and oddities from Huw's unique collection of Christmas records.

Deakin Scott has a new mix for Annie.

Heidi with two hours of stripped-down techno and bass-jackin' house.

Jaguar Skills is on the decks to create another of his special mash-up mixes.

Beats, bass, bleeps and wiggle with Toddla T.

Pop punk and indie techno with Alex Metric.

Jaymo and Andy George with box-fresh electro, future disco and house party beats.

Kissy brings you two hours of jump up rock and rave for Christmas Eve.

6/10. Dr Who was back after 16 years and the UK went mad for Arctic Monkeys.

5/10. Radio 1's story of the decade reaches 2004.

4/10. Radio 1's story of the decade continues as we rewind to 2003.

3/10. Radio 1's story of the decade continues as we rewind to 2002.

2/10. Radio 1's story of the decade continues as we rewind to 2001.

1/10. Radio 1 starts its ten-part story of the decade, rewinding to the year 2000.