Thanks for helping improve the accuracy of the site. We’ve noted what item you were on; please now visit the web page of the duplicate of Backstage Productions production of Duck Variations, by David Mamet, Regent Theatre, London, started 1^st December 1977 and click the button that will have appeared there.

If they have the exact same name, a search for Backstage Productions production of Duck Variations, by David Mamet, Regent Theatre, London, started 1^st December 1977 will probably help.