Former hostage John McCarthy has voiced his concern over violent scenes in Homeland, the hit drama about a US war hero turned by al Qaida, and dubbed part of the show's plot "ridiculous".
The US drama is just about to return on Channel 4 with a second series, having scooped a clutch of Emmy awards, including a best actor gong for its British star Damian Lewis.
Lewis, who plays US marine Nicholas Brody, has said he took inspiration for his character from An Evil Cradling, Brian Keenan's book on the four-and-a-half years he was held hostage in Lebanon by terror group Islamic Jihad.
Keenan's cellmate for much of that time was British journalist and broadcaster McCarthy, who was taken at gunpoint from a Beirut street in 1986 as he drove to the airport to catch a flight home.
McCarthy hinted that he disapproved of the scenes in Homeland, where Brody, who returns to the US as an al Qaida sleeper agent having been held captive in Iraq, appears to have flashbacks of beating a fellow marine to death to appease his captors.
He told the Radio Times: "My concern is that, with the flashbacks and hints and really horrible violence we see, his conversion is almost like titillation - let's keep watching... Did he really kill his comrade?"
He said of the flashback scenes: "It all seems so mad, the whole bloody plot. It seems ridiculous.
"But watching someone being beaten to death in that way, even in the fairly snippety bits I've seen - it is absolutely grotesque and makes your stomach churn.
"Stockholm Syndrome (the psychological phenomenon where hostages excuse and even defend their captors) can happen, of course, but I don't think it would happen through appalling torture frankly. I really don't think you could beat your mate to death."
McCarthy, who was debriefed by MI6 and the CIA when he returned to Britain, said the scenes showing Brody being questioned by the CIA did not ring true and were "an unrealistic portrayal of somebody re-entering society".