Given the close relationship between the theatre communities of Canada and Scotland, it is extraordinary that it has taken nearly ten years for Michael Healey's prize-winning smash hit play to make it across the Atlantic.

Now that it has, though, Andy Arnold has given it the handsomest of productions to launch his tenure as the new artistic director of the Tron. It's a fine play, based on one of the defining moments of modern Canadian theatre, when, in 1972, a group of actors created The Farm Show, based on their own discoveries from simply living in the Ontario farming community. In Healey's play Miles, one of those young actors, arrives at the farm run by Angus and Morgan, offering to work unpaid in return for being allowed to watch and listen.

Morgan sets the new city boy the usual country tasks - washing the gravel, rotating the crops overnight. But he and Angus are no ordinary couple. Angus lost part of his skull and most of his memory in the Second World War. He can still do mental arithmetic but otherwise has only old memories from before his injury. Morgan, out of loyalty and compassion, has spun a yarn to him about how they got into their current situation (evidently making a living out of farming was as hard then as it is now), beginning their childhood when Angus was a talented draughtsman or drawer.

It's an affecting tale, involving two English girls and a terrible car crash. The trouble is, most of it is made up to protect Angus from the truth of his situation. But when Angus sees Miles perform it, at a rehearsal of the show, it seems to jog his real memory and what actually happened gradually and heartbreakingly emerges.

After all those years struggling with the limitations of his former bailiwick at the Arches, Arnold has clearly relished getting his hands on a proper theatre. Hazel Blue's designs, a painstaking re-creation of the kitchen and outside yard of a farmhouse on the Canadian prairie in the early 1970s, gorgeously lit by Sergey Jakovsky, thrum with authenticity, the telegraph poles stretching away into that wide unfathomable sky.

It is a top cast too, with Benny Young as a caustic but loving Morgan, Brian Ferguson as a willing Miles and, above all, Brian Pettifer as the damaged Angus, using all his experience to extract the maximum pathos. It bodes well for the future of the Tron after three years that all will want to forget.

Until May 24. Box office: 0141-552 4267

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