This isn't very good in the usual respects by which I would typically determine the quality of a film, but this is a lot of fun and has something to it. In its more frenzied sequences, the film reaches some moments of ecstasy in line with what Railsback's character (in a performance that is often hilariously overwrought) is experiencing. There's a great bit in the Patrick Stewart possessed interrogation scene when the orderly comes in to deliver supplies, awkwardly interrupting the frenetic proceedings. It's delirious, it's chaotic, it's comedic, it's sublime.
The film belongs to the magnificent Frank Finlay, with his sonorous voice and glorious hair.