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Each episode involves performers walking through a door into an unknown situation, greeted by the line "Thank God you're here!". They then had to improvise their way through the scene. At the end of each episode a winner was announced.
Anne Edmonds, Sam Pang, Frankie McNair and Hamish Blake step through the blue door for the first episode of Thank God You're Here.
Melanie Bracewell, Guy Montgomery, Geraldine Hickey and Ross Noble step through the blue door on Thank God You're Here.
Emma Holland, Merrick Watts, Michelle Brasier and Rhys Nicholson step through the blue door on Thank God You're Here.
Urzila Carlson, Aaron Chen, Gillian Cosgriff and Luke McGregor step through the blue door on Thank God You're Here.
Ray O'Leary, Virginia Gay, Susie Youssef and Lloyd Langford step through the blue door on Thank God You're Here.
Marty Sheargold, Emma Holland, Zoe Coombs-Marr and Tommy Little, step through the blue door on Thank God You're Here.
Guy Montgomery, Ting Lim, Takashi Wakasugi, Melanie Bracewell step through the blue door on Thank God You're Here.
Peter Rowsthorn, Nina Oyama, Chris Parker and Anne Edmonds step through the blue door on Thank God You're Here.
Lloyd Langford, Bron Lewis, Felicity Ward and Ivan Aristeguieta step through the blue door on Thank God You're Here.
Sam Pang, Urzila Carlson, Guy Montgomery, Anisa Nandaula & Hamish Blake, step through the blue door for the last time this series, on Thank God You're Here.
