Sir Henry At Rawlinson End
£14.99, Digital Classics

"English as tuppence, changeless as canal water," as its creator Vivian Stanshall puts it, this film has lain almost hidden since its release in 1980. Even viewing this new, easily available DVD, though, you feel you are watching something secret and forbidden. It's not that it's full of gore, or sex and violence, just that it's one of the most unhinged and unsettling comedies ever made. As the commentary track reveals, it "began with a bottle of brandy". Bonzo Dog Doo-Dah Band leader Stanshall's creation seems riddled with booze and insanity. Shot in glorious sepia tone, it depicts a totally British world of inbred aristocracy, crumbling mentally and physically before your incredulous eyes. A brilliant Trevor Howard brings Sir Henry to swaggering life ("I don't know what I want," he roars, "but I want it now!"). He keeps prisoners as pets on his country estate, goes unicycling in blackface make-up, and is haunted by the brother he shot dead after mistaking him for a duck. Is there a point to all this? Or even a plot? No, not really. This is Stanshall's train of thought clinging drunkenly to the rails as he spews out a dense mixture of clever wordplay and jokes as old as the hills. An acquired taste, but one well worth acquiring.

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· To buy any of these titles call the Guardian DVD Service on 0870-836 0712 or rent an unlimited number of DVDs at theguardian.com/sofacinema