Psycho A-Go-Go (also known as Echo of Terror)[1] is a 1965 crime thriller directed by Al Adamson, starring Roy Morton and distributed by Hemisphere Pictures.

[citation needed] A psychotic young man named Joe Corey (Roy Morton) participates in a diamond heist with some friends, and kills one of his own cohorts during their escape.

[3] In 1969, Psycho A-Go-Go was completely re-edited, with additional footage featuring actor John Carradine as a mad scientist added, and the film was re-released by American General as The Fiend with the Electronic Brain.

[2] Still not satisfied with the result, in 1971 Adamson added still more new footage featuring actors Kent Taylor, Tommy Kirk and Regina Carrol, and re-edited the whole thing into an entirely different film titled Blood of Ghastly Horror.

[citation needed] The original 1965 version of Psycho A-Go-Go still exists today and has been released on DVD by Troma Pictures, with an introduction by Sam Sherman.