The series also features Heartstopper breakout star Corinna Brown.
Mr Bates vs The Post Office star Katherine Kelly leads the cast of an upcoming Channel 4 thriller, which sees a mother put her life on the line in a desperate bid to save her incarcerated son.
In Flight is filming right now in Northern Ireland, telling the story of flight attendant Jo Conran (Kelly), whose son has been sentenced to 15 years in prison for a murder that he insists he did not commit.
The synopsis reads: "Jo is approached by a gang who know all about her son and is blackmailed into using her job to smuggle drugs.
"She soon finds herself pulled into a murky underworld of corrupt cops and hired killers, forced to carry out their orders with no escape in sight.
"However, no matter how far Jo finds herself from her old life, her mission remains the same, to keep her son alive."
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In Flight is a six-episode series co-created and written by Mike Walden (Marcella) and Adam Randall (Slow Horses), while Chris Baugh (BBC Three's Wreck) is handling directing duties. It does not yet have a premiere date on Channel 4.
Katherine Kelly said: "I am really excited to be taking on the role of Jo and I can’t wait to tell her compelling story. I am delighted to be working with Buccaneer Media again and it’s joy to be filming in Belfast."
The cast of In Flight also includes Stuart Martin (Rebel Moon), Ashley Thomas (Great Expectations), Bronagh Waugh (Ridley), Harry Cadby (Everything Now), Corinna Brown (Heartstopper) and Ambreen Razia (Ted Lasso).
Co-creators Walden and Randall commented: "In Flight is our spin on the noir genre, a high stakes, stylish, romantic thriller with iconic characters and nerve shredding action.
"Channel 4 is the perfect home for our story and we're so excited to be collaborating with such a brilliant team. Jo is a character close to our hearts. She is an ordinary woman facing extraordinary odds. We can't wait for audiences to meet her."
In Flight is coming soon to Channel 4.
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David Craig is the Senior Drama Writer for Radio Times, covering the latest and greatest scripted drama and comedy across television and streaming. Previously, he worked at Starburst Magazine, presented The Winter King Podcast for ITVX and studied Journalism at the University of Sheffield.
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