Re: Is TAS worth watching in my complete Star Trek marathon?
"Yesteryear": The one indispensable episode, D.C. Fontana's Guardian of Forever story which filled in a lot of Spock's background and brought back Mark Lenard as Sarek.
Probably the closest TAS episode to a "must see". The only ep to hold my attention from beginning to end.
"Thank you.. for the drinks."