This series has a special place in my heart because of the day in 1974 when Dan Dorman and I
visited Hal Sutherland north of Seattle to interview him for our fanzine,
Free Fall.
He treated the two teenagers like royalty and made two lifelong fans.
I think the series
had only one time-travel story, “Yesteryear” (written by D.C. Fontana), which was the
second in Sutherland’s tenure. In that episode, Spock returns from a time-traveling mission
to find that he’s now in a reality where he died at age 7, and hence he returns to his own
childhood to save himself.
Captain’s Log, Supplemental: When we were in the time vortex, something appears to have
changed the present as we know it. No one aboard recognizes Mr. Spock. The only answer is
that the past was—somehow—altered.