This week's Clapper shot is from the classic episode "City on the Edge of Forever", one of the greates episodes ever made, IMO. Time travel, ancient civilizations, Joan Collins – what's not to love? This scene features one of the coolest Star Trek creations ever – The Guardian of Forever! Awesome!
Clapper info: February 13, 1967/Scene 5A/Take 1 – this was to be used for adding special effects ("optical FX" is written at the bottm).