An improvisational comedy series in which a celebrity performer is dressed up in costume before passing through a door into a room where they are welcomed with the phrase "Thank God you're here."

Each episode involves four celebrities walking through a door into an unknown and interesting situation, greeted by the line "thank God you're here." Each must then improvise his or her way through the scene. In between each scene, clips are shown of "practice" sessions filmed before the show, where they do things like try to sell items they know nothing about, go through an interview, or commentate an event. After all have had a go, there is an "All-In Challenge" where they are all put in the same situation together. After that, a winner is announced and given a trophy and flowers.

An improvisational comedy series in which a celebrity performer is dressed up in costume before passing through a door into a room where they are welcomed with the phrase "Thank God you're here" and must play out a scene as the only performer unaware of the skit's premise. The series has been distributed internationally with 13 countries making local versions, all, by regulation, utilising the same sketch premises.

Thank God You're Here is about well known performers doing a scene which they have no idea what's going on. It may be a Roman dungeon, a boardroom or a late night talk show. The only thing you can bank on is that everyone else in the scene knows who they are and that their role is critical. There is no 'voting out', just fun.—Ten

In the first episode (in four separate scenes), Angus Sampson was a surgeon, Fifi Box was a fitness guru, Peter Rowsthorn was a real estate developer, and Frank Woodley was a Roman centurion. Each had no idea what they were doing and made a fantastic attempt to keep the ball rolling. In the final scene, all four celebrities were dressed up as a group of children's entertainers, and had to pitch their TV show idea to network executives.—Matthew J Bevis