Monstroid is a 1980 American monster movie produced and directed by Kenneth Herts, co-written with Herbert L. Strock, and starring James Mitchum and John Carradine. Strock later claimed he co-directed the film uncredited. It was originally to be titled Monster when the film was first announced in 1975, and again in 1977, and suffered numerous cast changes. The film was eventually released in 1980 as Monstroid, and is also known as Monstroid: It Came from the Lake and The Toxic Horror. A novelization written by Peter Crowcroft was released concurrently with the film. Hartford had his own children play the two teenagers in the film.