Sheridan Smith's drama The Castaways, which has been branded as "unwatchable" by some, is now airing on UK TV.

The thriller first debuted on Paramount+ in 2023, and follows the disappearance of a woman called Lori (Smith) while travelling abroad.

In the wake of this, her sister Erin (Céline Buckens) investigates the use of Lori's credit card on a remote Pacific island.

sheridan smith, the castaways
Paramount+

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The series has now debuted on Channel 5 in the UK, airing its first episode on Sunday (January 26) and continuing to broadcast the last few evenings.

The show has been branded as "unwatchable" by some audiences, however, according to publications including the Daily Mail and The Mirror.

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"This is completely unwatchable," wrote one viewer on Twitter/X. "What appears to be Before and Now timelines jumping back and forth but without even clear indicators of what the hell is going on - I cannot follow ANYTHING about this slow, shoddy production."

However, others shared praise, one person posting: "Really enjoyed this, good to see something slightly different for a change!"

sheridan smith, the castaways official trailer
Paramount+

Related: Sheridan Smith describes her desert island transformation in new show The Castaways

Digital Spy gave the series a two-star review when it was originally released, though we did praise Smith's performance.

"Smith is the best thing about this thriller, with an affability that connects with everyone her character comes across, elevating some of the more lacklustre performances," we said. "Once we get into the thick of the jungle-survival portion, it's Smith as we've never seen her before."

However, despite comparisons to survival dramas such as Lost and Yellowjackets, The Castaways "doesn't really live up to those high concept extravagances".

The Castaways airs on Channel 5 and streams on My5 in the UK.

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Sam is a freelance reporter and sub-editor who has a particular interest in movies, TV and music. After completing a journalism Masters at City University, London, Sam joined Digital Spy as a reporter, and has also freelanced for publications such as NME and Screen International.  Sam, who also has a degree in Film, can wax lyrical about everything from Lord of the Rings to Love Is Blind, and is equally in his element crossing every 't' and dotting every 'i' as a sub-editor.