#StarTrek 38 (1967) - 9/10
The Changeling, written by #JohnMeredythLucas.
Good thriller, with an imaginative premise. The probe that the crew bring aboard the ship is basically a ticking bomb. Eventually it is going to turn on them and wipe them out. Waiting for that to happen is tense.
Excellent performance from #LeonardNimoy during the mind meld.
It may flag a bit in the middle, but the opening and closing acts are superb.
Kirk using logic to take NOMAD down is one of the high points of the entire series.
According to #IMDb users, this is the 26th best episode.