Dave Gorman has been commissioned to write a novel. He's got a big advance, but no inspiration. Then someone emails him, saying: "Dave, did you know you're a Googlewhack?" If you enter two words into the Google search engine and only one web page is found, that page is a Googlewhack. Gorman's interest is pricked and, from then on, he's powerless. He tries, unconvincingly, to resist: "I don't do these things any more. I'm 31!" But his effort to create a 10-link chain of Googlewhacks, and to meet each webmaster, has begun. Gorman's 71,000-mile Googlewhack adventure is animated by the same completist compulsion that saw him travel the world in search of his namesakes. This similarly trivial pursuit leads Gorman into the arms of a variety of fascinating strangers via a series of uncanny coincidences. Like Are You Dave Gorman? the show's winning quality is its suggestion that strangers are friends you haven't met yet.
Here, the motor is Gorman's desperation to grow up. Only completing the Googlewhack chain can excuse his failure to write that novel or justify having extended his whimsical youth by another year. It's a race against time, and Gorman's performance is breathless.
But one hour and 40 minutes is a long time to be perched on the edge of your seat: long enough, too, for the essential meaninglessness of Googlewhacking to assert itself. A shorter show would make a bigger impact.
· Until August 24. Box office: 0131-662 8740 .