An invisible scientist escapes from an asylum and teaches high-school physics to nubile teens.

A budding young scientist lad is caught by his mom checking out the lady across the way with his telescope, whereupon she lectures him on the evils of women. Twenty years later and all grown up, the scientist announces his theories of invisibility, and his colleagues laugh, to which he responds by killing four of them. He escapes from the loony bin and gets a job teaching summer school physics at a high school. The students decide to tease him about the same time as he perfects his invisible juice, and he goes on a spree of vengeance.—Ed Sutton <[email protected]>

Haunted by his lifetime dream of achieving total invisibility, ridiculed physics professor Dr Kevin Dornwinkle is shocked to discover that his formula works. After all, Dornwinkle has all the time in the world to perfect his unstable serum while posing as an eccentric substitute teacher. However, there's no such thing as a foolproof plan: the more the unhinged tutor experiments with the incredible juice, the more Kevin finds himself trapped in a voyeuristic fantasy world of unfulfilled desires and potent obsessions. And now that Kevin has tasted the fruit of his labour, there is no turning back; the bullied scientist must teach those who stand in his way a lesson they'll never forget. When violent passion rules the mind, who can stop the invisible maniac?—Nick Riganas