Big Finish Doctor Who/Recap/001 The Sirens of Time

Gallifrey is in crisis. The Doctor's homeworld is being attacked by a powerful enemy. The Time Lords attempt to contact the the Doctor for help. Meanwhile, the Fifth, Sixth, and Seventh Doctors are all having their own adventures at different points in time and space. Can the Doctors come together to save Gallifrey and correct the time stream?

This was the first Big Finish Doctor Who audio drama.

Tropes:

 * A Nazi by Any Other Name: Knights of Velyshaa.
 * Complete Monster: The Knights of Velyshaa.
 * Doomed Hometown: The Doctor has this with Galifrey unless he can save it. Ironic, given the new series.
 * Fan Service: The Fifth, Sixth, and Seventh Doctors all back? Hells yeah! What a way to kick off the series!
 * For Want of a Nail:
 * Retired Monster:
 * Shaggy Dog Story:
 * Xanatos Gambit: The Sirens of Time.