Uhura and Chapel get to kick some serious butt in this episode, which is awesome to see. Unfortunately they're about the only characters who behave sensibly at all.

Transcript

1
Captain's log, Stardate 5483.7. Investigating a region of space where ships disappear every 27.346 years.
Spock: Next disappearance in 3... 2... 1...
Uhura: Subspace signal, captain. It sounds like... music.
Kirk: Audio!
Signal: {singing} Laa... come to our planet... laaa...
2
Uhura: Nurse Chapel, to the bridge! The males seem to be affected by the subspace signal.
Chapel: {over intercom} Even Mr Sulu?
Uhura: Yes!
Chapel: {over intercom} Oh myyy...
Signal: {singing} Laa... Come aboard we're expecting you. La laa laaa...
3
{on a nearby planet}
Theela: I am Theela. We are a planet of females. We abduct males every 27 years.
Kirk: For breeding?!!
Theela: No, to drain your life force like vampires.
Kirk: Awww.
4
{Enterprise bridge}
Chapel: Female science team analysis. The signal is attractive and enervating to all males.
Uhura: I'm taking command of the Enterprise!
Chapel: Boo-yah!
5
{the planet}
McCoy: We're dying of old age. These women drain male bodies to be eternally young, but can't breed.
Kirk: Awww...
McCoy: With all the men affected, we'll never escape!
6
Uhura: Beam up the men to rejuvenate them!
Chapel: We'll relocate you to another world where you'll become normal women.
Theela: And breed?
Chapel: Yes, but not with these men.
Kirk, McCoy: Awww...