On the original series of "Star Trek", who was third in command of the Starship Enterprise?

Good question. Point of interest: his rank was Lieutenant Commander (Chief Engineer is a role, not a rank) hence third in command behind Mr. Spock, the Science Officer and First Officer whose rank was Commander. All taken from naval tradition.

little b, Star Trek, not Star Wars. Similar sounding but completely different.

Scotty was the best! You always had the impression that he wanted to strangle Krik from time to time.

e+z

Technically correct. However, Scotty seldom took control of the bridge. That was usually Sulu and even, on occasion, Uhura.

LGT, Very nicely explained LGT. Dismiss.

Snance, That’s an emotional conclusion. Never let that colour any decisions when in com(man)d.