Britain's Got Talent: The Champions

The first episode features the return of Paul Potts and Boogie Storm, as well as Ukraine's Kseniya Simonova and father-daughter duo Bello and Annaliese Nock from the US.

The second installment features the return of Lost Voice Guy, the first comedian to ever win the show, the group Mersey Girls from series 11, and series 5's winner Jai McDowall. Joining the British entries is an unusual act from Germany - Alexa Lauenburger and her eight performing dogs.

This week sees the return of the musical theatre singing group and winners of series eight, Collabro; and one of the most dangerous acts we've ever seen on the show, winner of Russia's Got Talent, sword swallower Alex Magala. Plus, dancing duo from series four, Twist and Pulse. Expect to see the return of other familiar faces as well as welcoming brand new talent from across the world.

Ant and Dec present a special version of the talent show, in which stars from the past 13 series of Britain's Got Talent compete against winners from versions of the programme from around the world to impress the viewers and judges Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams. Each week, two acts will make it through to the grand finale. The first is a Golden Buzzer act chosen by one of the judges, or Ant and Dec, while the second is voted through by superfans in the arena audience.

Ant and Dec present a special version of the talent show, in which stars from the past 13 series of Britain's Got Talent compete against winners from versions of the programme from around the world to impress the viewers and judges Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams. Tonight, another two acts make it through to next week's grand finale - the first is a Golden Buzzer act chosen by one of the judges, while the second is voted through by fans in the arena audience.

After five weeks of previous champions from around the world taking to the stage, Ant and Dec introduce the final in which the overall winner is eventually revealed.