Listen in as Harryhausen recounts his early, primitive techniques using rubber dinosaurs and stop-motion photography to bring to life movies such as “One Million Years B.C.”

Harryhausen unlocks the question pursued throughout the program about the juvenile attraction to dinosaurs: They’re real, and knowing dinosaurs once walked on this planet makes them more special than cartoon characters.

This is a must-have program for special-effects buffs, especially for the Harryhausen segments.