A larkish bunch of zany teen monsters (such as Frankenstein and Wolfman) form a rock band and crack jokes in Horrible Hall in this effort to mix pop music with kiddie cartoons (à la 'The Archies'). The show was spun off from 'Sabrina and the Groovie Goolies.' Original episodes aired on ABC from 1975 to '76; and a syndicated sequel, 'The Groovie Goolies and Friends,' followed in 1978.