Garth Marenghi's Darkplace (2004)

The conceit is perfect: a lost 1980s horror series by a self-proclaimed visionary author, finally broadcast with smug commentary from its "original" cast. Matthew Holness and Richard Ayoade mock the stilted acting, shoddy effects and clumsy editing of low-budget genre television, and the vanity of the man in charge of it all. Romford's Darkplace Hospital sits on a gateway to hell, which is about as much plot as you need. Channel 4 aired a single series of six episodes, and nearly every one repays a second watch.