Episode 1
Episode 1
When Colin Howell and Hazel Buchanan meet at their local Baptist Church in rural Northern Ireland, they start an affair which will have cataclysmic consequences.
Where to watch The Secret
TV series
The Secret
20161 season6.3 / 10
The true story of a Sunday school teacher and respectable dentist and pillar of the community, who formed a murderous partnership.
Streaming, rental and purchase options
Where to watch in United States
Checked Jul 22, 2026
The Secret is available to stream on Peacock, Peacock Premium, Spectrum On Demand, The Roku Channel, and Tubi in United States. Use the direct links below to open the provider.
Watch free
Synopsis
The true story of a Sunday school teacher and respectable dentist and pillar of the community, who formed a murderous partnership.
Season 1 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Episode 2
Colin and Hazel carry out his plan to kill Lesley and Trevor, and stage it to look like a suicide pact. But will the community and the police believe their story?
Where to watch The Secret
Episode 3
Episode 3
As the inquest approaches, Colin and Hazel have to hold their nerve. But even if they do get away with it, can their relationship survive?
Where to watch The Secret
Episode 4
Episode 4
The past catches up with Colin as he is finally driven to confess his crime. But when Hazel pleads not guilty, will Colin take all the blame?
Where to watch The SecretEpisode information updated Jul 22, 2026
More about The Secret
Cast
James NesbittColin Howell
Genevieve O'ReillyHazel Buchanan
Laura PyperLesley HowellGlen WallaceTrevor Buchanan
Stuart GrahamDave Stewart
Liam McMahonD.S. Ferris
James GreeneGranda Harry Clarke
B.J. HoggJim BuchananCredits
- Created by
- Stuart Urban
- Written by
- Stuart Urban
Production details
- Status
- Ended
- Series type
- Miniseries
- Episodes
- 4
- Original language
- English
Networks & production
ITV1United Kingdom
ITV StudiosUnited Kingdom
Hat Trick ProductionsUnited Kingdom
Themes
based on true storydouble murderextramarital affairmale dentistminiseriesmurder
You may also like
More shows like The Secret.
