Watching plays on television does require a certain mindset. Appearing as part of BBC Four’s Sunday Night Performance strand, Prisoner C33 is a brand new one-man play about Oscar Wilde’s time in Reading Gaol. It’s written by Stuart Paterson, directed by Trevor Nunn, and stars a very good Toby Stephens as Wilde, playing two very different versions of the writer in conversation with each other. If you are in the mood for an hour of one man talking to himself about the great misfortunes of his life, in a dim, candlelit cell, while the perforated eardrum that would contribute to his death causes him great pain, then this is a poetic and well-crafted play that I imagine would be even more electric on stage.