These original Talosians were the first to come underground on Talos IV. Over the generations they concentrated on developing their mental power, and eventually forgot how to repair the machines left behind by these ancestors. Those descendants became stagnant, and instead chose to relive the lives left behind in the thought record, over and over.
- See: The Keeper
In all, thousands of observers were probing the thoughts of Christopher Pike following his arrival and captivity on Talos. The first observer then reported to the magistrate that "we find excellent memory capacity." (TOS: "The Cage ", "The Menagerie, Part II")
He along with the Keeper attempted to determine what species they could use to recolonize their planet. They would use illusions to test the subjects. After he examined the Enterprise's ship records, he learned that Humans possess a strong hatred of captivity, and were unsuitable for breeding. (TOS: "The Cage")
This observer was part of three Talosians that captured different species to determine if they could be used to recolonize their planet.