TheShoal spaceship was the riggedspaceship which theShoal of the Winter Harmony planned to use to destroy the whole ofNew York City.

Noting that the lights weren't on, theTwelfth Doctor andNardole visited the ship, where they encountered a pair ofShoal droids.

Grant stopped the ship from crashing into New York by acting as a buffer. The Doctor had Grant throw the ship intothe sun where it would be harmlessly destroyed. (TV:The Return of Doctor Mysterio)