Without a doubt, this is a stellar cast. Costello (who doesn’t leave the stage for the entire 1 hour and 45-minute runtime) is a natural storyteller. Through small nuances in his body language, he sets the scene and time perfectly. He commands the stage throughout and shows the intensity of Steven with his closed posture and distant gaze.
Potter equally brings a complex intensity to his portrayal of Barry, whilst still having a direct contrast to Steven. It could be quite easy to ham up this part into a caricature due to its erratic nature, but Potter brings a believable take to a difficult role.
Light comic relief is brought by Ainsworth who in her opening scene is reminiscent of a sketch from The Catherine Tate Show. As the character peels away, we are shown an impressive, layered performance by Ainsworth.