The last time I had to venture back stage, through an extension of the set, to get to my seat at the Young Vic was when Michael Sheen played Hamlet. This time it is for Joe Penhall's Blue/Orange - is it a coincidence that both are set in institutions? Tables and chairs are askew and abandoned from a earlier story to which we weren't party. The only other clues are segments of oranges, peeled and left, perhaps thrown, perhaps dropped.

Christopher (Daniel Kaluuya) is a day away from release from a mental hospital. He thinks his father is Idi Amin and oranges are blue. He's ready to go home but his doctor Bruce Flaherty (Luke Norris) doesn't think he is. He suspects, rather than suffering from delusions and paranoia he is actually schizophrenic and isn't ready to cope on his own. He wants more time to properly diagnose Christopher. He asks his supervisor Dr Robert Smith (David Haig) for his opinion but Smith just wants a bed free.

This three-hander is a tense and darkly funny piece. Flaherty is young, scrupulous and idealistic. Smith is concerned only with promotion, status and maintaining the status quo. Battle lines are drawn with Christopher in the middle.

It is a play about mental health and how we treat those suffering but it is also about ethics and ethnicity, idealism versus reality. Smith is fiercely ambitious doing anything to protect his career path while Smith is unflinchingly righteous in his pursuit of doing his job.