Under Investigation Season 4 Episodes

Find out where to watch Season 4 of Under Investigation tonight

Season 4 Episode Guide

Episode 1 - The Cop Who Knew Too Much

Liz Hayes and the experts investigate the strange death of a top SA cop in 1981. Written off as suicide, compelling new revelations point to a sinister plot to kill the detective.

Episode 2 - The Hate Police

In the 1980's and 90's, Sydney's gay community fell victim to ruthless bashings by savage gangs. Now, Under Investigation can reveal the role played by the NSW Police Force.

Episode 3 - Gangs of Sydney

After over a dozen killings in 18 months, Sydney's gangland wars are getting bloodier. Under Investigation pulls back the curtain on the city's dark underbelly.

Episode 4 - The Highway

Between 1970 and 2018, 11 people have vanished along the Flinders Highway, including missing backpacker Tony Jones. Under Investigation pieces together his final hours.

Episode 5 - Dark Seas

Travellers onboard cruise ships have seen violent crime, pollution, and now a COVID crisis. Liz Hayes and a panel of experts examine whether it has learnt from past lessons.

Episode 6 - Girls Gone

50 years ago, 11-year-old Joanne Ratcliffe and 4-year-old Kirste Gordon were snatched from the Adelaide Oval. New technology helps identify their kidnapper and reveal a twist.

Episode 7 - Bad Faith

Uncover the terrifying abuse faced by young, vulnerable women at the hands of the Esther Foundation, a Perth cult once backed by some of the most powerful leaders in the country.

Episode 8 - Slug Gate

After government inspectors found a slug in a Melbourne catering company's factory, a public health warning erupted into a bitter brawl between a David and a Goliath.



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