1. Episode 1

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. 21 October 2019. 45 min

Revenue inspector Scott is on the lookout for fare evaders attempting to force their way through the ticket barriers. Alex and Baba join forces with the police in a sting operation along a busy stretch on one of the city's busiest bus routes.

2. Episode 2

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. 28 October 2019. 45 min

Revenue inspectors Karen and Peter stop dishonest commuters exploiting a transport loophole.

3. Episode 3

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. 4 November 2019. 45 min

A prolific barrier-blagger is handed an eye-watering bill for three years of illegal travel, while in east London, tube enforcement officers Karen and Peter stop passengers cheating with discounted tickets.

4. Episode 4

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. 11 November 2019. 45 min

Undercover investigator Dan has a fresh case to crack at Kings Cross as someone pretends to `tap on' the ticket barriers with a declined debit card, before audaciously shuffling his way through the gates behind honest paying travellers.