It’s got three actors, a virtually bare set, and explores how best to deal with the mental illness schizophrenia.

Probably not the most seductive of settings for an evening of entertainment at the theatre.

But Joe Penhall’s award-winning play Blue/Orange is a riveting and compelling work with convincingly enigmatic characters who ensured the story enthralled and thrilled its audience.

It features a young patient Christopher (Oliver Wilson) from south London who believes his father is Ugandan military dictator Idi Amin.

Junior psychiatrist Bruce (Gerard McCarthy) wants to keep him in hospital, but his boss Robert (Robert Bathurst) believes he should return home.

The play skillfully exposes that the way forward for Bruce is not as simple as black and white.

And the witty exchanges and excellent performances by the three actors, especially Bathurst, brought the complex issues to life.

Until Saturday.