Immediately after the recap at the start of this episode, the image is focusing on a photo of a group of soldiers and zooms out to reveal a Polaroid (SX-70) instant picture, with a caption written on the front side of the developer pod, dating the image as July 1970. SX-70, Polaroid's first film that developed in front of the user's eyes, (as opposed to traditional peel-apart films) was not introduced until 1972!