"I made an error in my computations."
--Spock
"This may be an historic occasion."
--McCoy
"Warp eight... off the scale."
--Sulu
"Gravity [down to] .8."
--Voice in background.
PLOT
On their way to Starbase 9, the Enterprise is accidentally flung back (by a
black star that pulled them in) to the year 1967 (isn't it odd how they
always end up in the 1960s?), and through space to Earth (Spock does some
hand-waving to explain that they were headed sort of Earth-ward at the
time), where they must take desperate measures in an attempt to avoid
changing history. The Enterprise used up all of its power; propelled away
fast.
A ground radar crew spots the Enterprise and sends up a US Air Force pilot,
who sees the ship and reports it as a UFO. The plane starts breaking up
when the Enterprise puts a tractor beam on it, so Kirk has the pilot beamed
aboard.
To get back to the present, the crew slingshot around the sun. They beam
back the USAF Captain to his plane just as he was being beamed out - I
might be convinced to buy that, but the guy with the green beret hat is
beamed into his other body long before he was beamed away (he was still
standing in the hallway) - how do they explain the fact that his mass just
doubled?
FACTS
The Earth has no clouds!
Kirk mentions that there are "12 like her in the Fleet" (referring to
the Enterprise).
The Enterprise passes many stars on its journey between the Earth and
the sun!
The USAF Captain's (unborn) son (Col Shawn Jeffrey Carpenter) heads the
first Earth Saturn mission.
Only episode which shows the Enterprise from the bottom?