[Telepathic Intruder]

Yes, maw is a much more appropriate term than mouth.

[Dahoser]

I recently found this feature on The Doomsday Machine which is simply fantastic.

Star Trek, "The Doomsday Machine" Revealed
(https://www.youtube.com/watch?v=AAfEXDCsRmg&t=1s)

Also, you can get soundtracks of the episodes on Amazon and elsewhere, and many are available through Prime Music.

Star Trek: Volume 2 - Doomsday Machine and Amok Time