TOS S02E18, S02E19, S02E20

In this installment:
(viewed March 19-21)

Star Trek: The Original Series, S02E18 - "The Immunity Syndrome"
Star Trek: The Original Series, S02E19 - "A Private Little War"
Star Trek: The Original Series, S02E20 - "Return to Tomorrow"

"The Immunity Syndrome"

• We learn that USS Intrepid is "manned by Vulcans", and moments later Spock experiences a, uh...disturbance in the force.  In their defense, this episode was written and produced before the death of Alderaan was a gleam in George Lucas' eye ;)
• This episode features Spock's statement that Vulcan has never been conquered in living memory, and that living memory goes so far back that "no Vulcan can conceive of a conqueror".
• There's an interesting dynamic between Kirk, Spock and McCoy in this episode--Kirk must choose between Spock and McCoy for a dangerous mission, and each man struggles to understand the other's motivations.
• "Brace yourselves, the area of penetration will no doubt be sensitive".  Uh...

"A Private Little War"

• ...in which Spock gets shot with a flintlock musket.  That's gotta smart.  But least his heart's where his liver should be!
• The next time I'm critically wounded, I'm going to enlist the help of a crazy woman in a hunter orange halter-top, rubber poop, and a hippie playing a bongo.  Works every time!
• I've changed my mind.  I think the next Star Trek movie should be a flashback film in which we see what Qo'noS looked like when the Klingons were all running around with muzzle-loading firearms.  ♫ Davy, Davy Martok...king of the wild Ketha Lowlands! ♪
• This is why we put our tricorder on "vibrate" before spying on an indigenous village that might be getting help from the Klingons, McCoy.
• How much fun did Dr. M'Benga have slapping the bejeesus out of Spock?  I bet McCoy was mad that he wasn't there for that.
• Sometimes I forget what a peacenik Bones could be.  When you don't fight, the terrorists Klingons win, man!
• If we've learned anything from Star Trek, it's that the flora on alien planets represents a bigger danger to manned space exploration than hostile aliens, spacial anomalies, or brilliantly snide douchebags with limitless powers.

"Return to Tomorrow"

• When Kirk dispatches a message to Starfleet informing them of his decision to continue contact with the alien intelligence on Arret, Uhura informs him that it will take "three weeks" for the message to reach Starfleet due to their distance.  The precise limitations of Starfleet's interstellar communications, be they traditional radio or subspace radio, took quite some time to get ironed out (just as with the specifics of most Treknology).  This dialog is a good example of that.
• PULASKI!
• "A simple transference.  Their minds and ours."
  "Quite simple.  Happens every day."
• "Risk! Risk is our business. It's why this starship was built. It's why we're aboard her."
• Enough with the groping, kids. We've got robot bodies to build.
• Spock is just, like...the king of transferring out of his body, and dying, and coming back, and all that jazz.