<P> The commandos parachute in, with one man killed on landing, leaving three to complete the mission . Later, Warden is wounded in an encounter with a Japanese patrol and has to be carried on a litter . He, Shears, and Canadian Lieutenant Joyce (Geoffrey Horne) reach the river in time with the assistance of Siamese women bearers and their village chief, Khun Yai . Under cover of darkness, Shears and Joyce plant explosives on the bridge towers below the water line . </P> <P> A train carrying soldiers and important dignitaries is scheduled to be the first use of the bridge the following day, so Warden waits to destroy both . However, at daybreak the commandos are horrified to see that the water level has dropped, exposing the wire connecting the explosives to the detonator . Making a final inspection, Nicholson spots the wire and brings it to Saito's attention . As the train is heard approaching, they hurry down to the riverbank to investigate . The commandos are shocked that their own man is about to uncover the plot . </P> <P> Joyce, manning the detonator, breaks cover and stabs Saito to death . Aghast, Nicholson yells for help, while attempting to stop Joyce from reaching the detonator . As he wrestles with Nicholson, Joyce tells Nicholson that he is a British officer under orders to destroy the bridge . When Joyce is shot dead by Japanese fire, Shears swims across the river, but is fatally wounded as he reaches Nicholson . Recognising the dying Shears, Nicholson exclaims, "What have I done?" To save Shears from being taken prisoner alive, Warden fires his mortar at him, mortally wounding Nicholson in the process . The dazed colonel stumbles towards the detonator and collapses on the plunger just in time to blow up the bridge and send the train hurtling into the river below . Witnessing the carnage, Clipton shakes his head muttering, "Madness!...Madness!" </P> <Ul> <Li> William Holden as Commander Shears </Li> <Li> Alec Guinness as Lieutenant Colonel Nicholson </Li> <Li> Jack Hawkins as Major Warden </Li> <Li> Sessue Hayakawa as Colonel Saito </Li> <Li> James Donald as Major Clipton </Li> <Li> Geoffrey Horne as Lieutenant Joyce </Li> <Li> André Morell as Colonel Green </Li> <Li> Peter Williams as Captain Reeves </Li> <Li> John Boxer as Major Hughes </Li> <Li> Percy Herbert as Private Grogan </Li> <Li> Harold Goodwin as Private Baker </Li> <Li> Ann Sears as Nurse </Li> <Li> Henry Okawa as Captain Kanematsu </Li> <Li> K. Katsumoto as Lieutenant Miura </Li> <Li> M.R.B. Chakrabandhu as Yai </Li> <Li> Vilaiwan Seeboonreaung as Siamese girl </Li> <Li> Ngamta Suphaphongs as Siamese girl </Li> <Li> Javanart Punynchoti as Siamese girl </Li> <Li> Kannikar Dowklee as Siamese girl </Li> </Ul>

Who blew up the bridge over the river kwai
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