A turn of the century wild west show struggling to make a living in Mexico comes into the possession of a tiny prehistoric horse. This leads to an expedition to the Forbidden Valley where they discover living dinosaurs. They capture one and take it back to be put on display, leading to inevitable mayhem.

Da de zombie-agtige rumvæsner lander ved en amerikansk militærbase, leder de efter hjælp til at redde deres døende planet, og de prøver at skabe en fredelig kontakt med videnskabsmanden dr. Russ Marvin (Hugh Marlowe) og hans hustru Carol (Joan Taylor). Men militæret møder flåden af flyvende tallerkner med en regn af kugler, og rumvæsnerne bliver tvunget til at svare igen.

Kan Marvin opfinde det ultimative våben i en nervepirrende kamp mod uret og dermed redde menneskeheden?

A tribute to stopmotion supremo and special effects genius extraordinaire Ray Harryhausen, the man behind some of cinema's greatest fantasy films - The Beast From 20,000 Fathoms, The Seventh Voyage of Sinbad, Jason & The Argonauts and One Million Years BC. Featuring exclusive footage of Harryhausen at work on his first stopmotion for over 20 years, and contributions from many of Hollywood's top special effects directors and creators.

Documentary about the life and work of Ray Harryhausen.

Inspired by the artistry of Willis O’Brien & Ray Harryhausen.