The Walk-In (2022) stars Stephen Graham as Matthew Collins, a former neo-Nazi who now works as an informant, alongside Dean-Charles Chapman as Robbie Mullen, a young man drawn into far-right extremism, and Andrew Ellis as Tony, a fellow…
Main cast
- Matthew CollinsStephen Graham1Main
- Robbie MullenDean-Charles Chapman1Main
- Nick LowlesJason Flemyng1Main
Supporting cast
- TonyAndrew EllisSupp
- DellaHannah WaltersSupp
- Joan CollinsLinda GreenawaySupp
- PaulSamuel Edward-CookSupp
- MikeMark StanleySupp
- ImranHarish PatelSupp
Guest & voice
- StuartTommy SweeneyGuest
- GrahamAndre SquiresGuest
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About this cast
The Walk-In is a 2022 BBC One drama series based on the true story of Matthew Collins, a former neo-Nazi who became an informant for the anti-fascist organisation Hope not Hate. The five-part series, written by Jeff Pope, follows Collins as he works to prevent a terrorist attack and attempts to deradicalise a young extremist named Robbie Mullen. Starring Stephen Graham as Collins, the show…
FAQs
Who plays Matthew Collins in The Walk-In?
Stephen Graham portrays Matthew Collins, the former neo-Nazi turned informant, in the BBC drama The Walk-In.
Is The Walk-In based on a true story?
Yes, it is based on the real-life story of Matthew Collins, a former member of far-right groups who later worked as an informant for the organisation Hope not Hate, helping to prevent a planned terrorist attack in 2017.
How many episodes are in The Walk-In?
The series consists of five episodes, each approximately one hour long, and was first broadcast on BBC One in October 2022.
Who plays Robbie Mullen in The Walk-In?
Dean-Charles Chapman plays Robbie Mullen, a young man who becomes involved with far-right extremism and is guided by Matthew Collins.
Where can I watch The Walk-In?
The complete series is available on BBC iPlayer in the UK, and has also been broadcast on various streaming platforms internationally.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026