SO, Professor Stephen Hawking killed the staff at the Star Gazer observatory and planetarium with a death ray activated from an e-mail attachment. It's not every play that ends with such a denouement; indeed thanks to the unique nature of Star Destroyer, the play will never end that way again.

Star Destroyer featured a scripted first half –written by local playwright James 'Lloydie' Lloyd – whilst the second half was entirely improvised, based on the suggestions of a large, enthusiastic audience.

The six players – five from MissImp, Nottingham's improvised comedy group - were truly terrific, building on the characters and plot of the first half to tease out a totally bizarre, funny and enthralling Act Two.

Creating almost an hour's worth of play on the spot is staggeringly brave. With one audience member asked at half time to secretly write the name of the person 'whodunnit', the cast had to develop their characters and a series of plotlines in order to take Star Destroyer to a logical conclusion. With an entertaining set of characters, some great one-liners and an increasingly bizarre plot (the audience's fault, obviously!) Star Destroyer was incredibly satisfying and everyone concerned should be proud of a superb achievement.

The joy of it - and the reason it could be terrifically successful - is that neither you nor the players know what's going to happen next.

Such brave, ambitious and well conceived theatre is to be highly applauded.

Nick Parkhouse