Big Finish Doctor Who/Recap/S1/E03 Horror of Glam Rock/NEDA

The Doctor, trying to get Lucie as close to her home time as he can, lands in the middle of a snow storm in 1974. The two of them step out of the TARDIS and almost immediately tromp on a mutilated corpse. They go into a nearby diner to notify authorities, and wind up trapped there facing a literal alien invasion. While people rapidly start dying, Lucie realises that the diner's waitress is actually her aunt Pat, and introduces herself. Pat is extremely disappointed that in Lucie's time, she's "a nobody", not a famous drummer as she hoped to become. She decides to just become the best aunt she can be once Lucie is born. And the Doctor saves the day using Lucie's MP 3 player and a stylophone.

The Headhunter is still on her way.

Tropes

 * Bottle Episode: The entire thing takes place within a roadside cafe.
 * Eldritch Abomination: What the aliens' "real" forms look like.
 * Mind Control: The aliens want to use Tommy and his music to trick his fans into becoming dinner.