Overview: From Belfast to London, from Aberdeen to Exeter and from Newport to Newcastle, the production team have travelled the length and breadth of the country auditioning thousands of artists in the search for the stars of tomorrow. The next 13 weeks see the culmination of that exciting and enormous challenge in the only television talent showcase which is open to all. Tonight Opportunity Knocks for: Act 1 Air Theatre, Act 2 Boothby Graffoe, Act 3 Wendy Kane, Act 4 Darren Day, Act 5 Mystina, Act 6 Fingers and Thumbs