Shipwrecked: Battle of the Islands Season 1, Episode 4: Week 4

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Week 1

A fresh group of young castaways are marooned on the Aitutaki Atoll in the South Pacific, but this time there are two islands and two tribes competing for the hefty prize.

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Week 2

The two tribes of castaways - the Tigers and the Sharks - continue their building work and settle in to life on the islands.

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Week 3

New arrival Kevin spends his first three days on Shark Island, and is surprised when Geoff nonchalantly flicks a scorpion at him...

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Week 4

When 20-year-old multi-million-pound heiress Charlie Murray steps ashore for her first three days on Tiger Island, Katie shockingly reveals that she knows her from 'real life'...

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Week 5

Sam Bush is an instant hit with the Sharks. But will he be impressed by them? They're feeling the pressure since Charlie Murray chose to become a Tiger.

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Week 6

New arrival James George spends his first three days on Tiger Island, but he's left to settle in on his own while the Tigers settle their differences.

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Week 7

Two new arrivals look for a home: law graduate Richie Biedul and office assistant Lucy Roberts-Bakkioui spend their first three days on Shark Island.

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Week 8

Ishta Nyakoojo spends her early days on Shark Island and becomes firm friends with trainee barrister John.

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Week 9

Another castaway joins the game when flight attendant James Mudie steps ashore on Tiger Island and quickly reveals a secret he's been keeping even from his family.

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Week 10

New girl Jo is keeping a secret - her brother is original Shark Geoff, who moved out to the other side of the island to live alone.

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Week 11

New arrival Lorna chose to become a Shark at the beach party, but there are things that her fellow tribe members don't yet know about her.

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Week 12

Following Badoo's shock decision to switch islands at last week's beach party, he seems to be in good spirits and is throwing himself into life as a Shark.

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Week 13

Love is in the air as recent arrival Courtney tries to romance one of the Tiger girls, while girl-mad new boy Gareth falls for original Shark Niff.

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Week 14

Week 14 in the South Pacific and the score is Tigers 12, Sharks 10. Having won the last three new arrivals, the Tigers seem unstoppable - can the Sharks catch them up?

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Week 15

More surprises in store for the Sharks and the Tigers when two more new arrivals show up.

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Week 16

Dirty tricks are afoot. With the Sharks still ahead, but their lead narrowed to one point at 13-12, all-important new arrival Ryan Lewis meets the Tigers first.

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Week 17

With only two new castaways left to arrive, the battle has reached a crucial stage, and both tribes are desperate to lure the final contestants on to their team.

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Week 18

With just two weeks left in the competition, new arrival Jonathan is well aware of how important he is to both tribes as they each try desperately hard to woo him.

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Week 19

It's the penultimate episode, and things are hotting up in paradise with still a few twists before the final beach party and the overall result.

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Week 20

It's the Shipwrecked grand finale - the day of the final beach party, where one tribe will win the £70,000 prize.