'Ex on the Beach' is to return for a fourth series.

The mystery cast of Ex on the Beach series 4

The mystery cast of Ex on the Beach series 4

The MTV dating show is set to create more tidal waves than ever before as eight new sexy singles travel to Portugal for what they think will be a holiday in paradise.

The new series will see the introduction of the Tablet of Terror that will leave the singles even more clueless about when and where an ex will turn up looking to settle a score, as in a departure from the first three series it won't just be the beach where they come face to face with former flames.

With devious new twists and an increasingly tangled web of relationships, contestants are warned to expect the unexpected.

The announcement of the fourth series comes after the first three series proved to be a huge ratings success for MTV.

Former 'Geordie Shore' stars Vicky Pattison, Charlotte Crosby and Gary 'Gaz' Beadle have all appeared on previous series as have 'Magaluf Weekender' hunk Jordan Davies and former 'The Only Way Is Essex' star Kirk Norcross and his ex-fiance, former 'Celebrity Big Brother' beauty Cami Li.

This series is set to be more explosive than ever and viewers have been told to get ready for unexpected twists, inescapable heartbreak and a multitude of storms forecasted to hit the beach at any time or place.

'Ex on the Beach' premieres on Tuesday January 19 at 10pm only on MTV.