He will feature in the eight-episode crime drama, alongside James Nesbitt, Richard E. Grant, Joely Richardson, Anne-Marie Duff, and Ben Miller.
The 42-year-old posted about the project on social media, alongside some new photos released in early May.
He said: “’Suspect’ for @channel4 with an all star cast, directed by Dreis Vos coming soon!”
Heughan has also previously shared a behind the scenes selfie taken during filming.
Watch the trailer for Suspect with James Nesbitt and Sam Heughan
A new trailer has been released for Channel 4’s Suspect.
"Don’t go sticking your nose into things that are best left well alone,” says Heughan’s character Ryan.
"I’d start talking if I were you,” says Danny, played by Jimmy Nesbitt.
You can watch it on social media where Sam Heughan has shared it.
What is Channel 4 show Suspect about?
Based on the Danish series Forhøret, Suspect is being directed by Dreis Vos and produced by Eagle Eye Drama.
James Nesbitt will play veteran detective Danny Frater, who turns up for a routine ID at a mortuary to discover the body of his own estranged daughter Christina (Imogen King).
He sets out on a mission for the truth, retracing her last days, and identifying eight suspects in connection with her death.
Each episode is said to be focusing on Danny and just one other character. Sam Heughan will play Christina’s godfather, Ryan.
A release date has not yet been announced for Suspect, but it will air on Channel 4.
Can I watch Suspect on Channel 4 in the US?
Unfortunately, Channel 4 is not available outside of the UK.
However, it could become available on another streaming platform once it has aired on Channel 4.