You never seen anyone from the planet Vulcan before?

There it is revealed she is the good side of the planet Vulcan, which was torn in two.

An emergency meeting of the planet Vulcan's ruling council exposes its secret history.

May it be preserved from the ignominious fate of the planet Vulcan.

He is portrayed as the most important philosopher in the history of the planet Vulcan.

They are named after the hypothetical planet Vulcan, whose existence was disproven in 1915.

It is the only episode of the series to depict scenes on the planet Vulcan.

They'd changed enormously from the rather simple creatures that had caused death and devastation on the planet Vulcan eighty years ago.

Kirk wasn't talking just about the planet Vulcan, but about his friend.

A strange device found by a scientific expedition is taken to the planet Vulcan.