According to Memory Alpha, the barrier appears in at least three TOS episodes: “Where No Man Has Gone Before”, “By Any Other Name”, and “Is There in Truth No Beauty?”
@concrete_baby I swear I have seen all of TOS multiple times, but it has all faded. Mean while, the first thing I thought of was the galactic barrier in Star Wars canon, which seems less out of place, because, you know, space wizards.
According to Memory Alpha, the barrier appears in at least three TOS episodes: “Where No Man Has Gone Before”, “By Any Other Name”, and “Is There in Truth No Beauty?”
@concrete_baby I swear I have seen all of TOS multiple times, but it has all faded. Mean while, the first thing I thought of was the galactic barrier in Star Wars canon, which seems less out of place, because, you know, space wizards.