So the Merkan military-industrial complex are refurbishing their Trident nucular weapons for our UK nucular submarines (once the damage has been repaired) but they have hit a tiny snag.
They've got plenty of plutonium.
They've managed to source a DeLorean DMC-12 that can still just about reach 88mph.
But they've totally lost the plans for one vital component.
It's a mysterious but very hazardous material codenamed Fogbank.
Better known as a Flux Capacitor.
Without it, their nucular missiles are nothing more than fancy doorstops.
Or worse.
All the scienticians involved in the original design have either died, retired or "moved on".
Where's Marty McFly when you need him?