An instant of the Time War brings centuries of conflict to the planet Drakkis, and the Eighth Doctor is there to witness the terrible results.
A Sontaran fleet, desperate to join the epic conflict, follows in its wake to take advantage of the fallout. But when Commander Jask is beamed down to the ravaged surface, there is more to his arrival than first appears.
Soon, an unlikely champion joins forces with the Time Lord to fight for the future of her world, and together they must face the Sontaran Ordeal...
After Sarana describes the Doctor as "a very frustrating man", he retorts that she is not the first person to say that.
The Doctor claims to be a tourist.
The Doctor mentions that he trained with Musashi to swordfight.
All Sontarans are aware of the Doctor and the TARDIS.
Sarana has two sons who were taken in battle.
Drakkis' sector of space was contaminated by temporal flux, which occurs when the effects of the Time War enter real time. The Sontarans' battle computers indicate that, prior to the alteration of history, Drakkis had been at peace for its entire existence. Other planets have suffered the same. The effects are irreversible.
Notably, this is the only story in the Classic Doctors, New Monsters series that features enemies from the Classic era, as the Sontarans made their debut during the Third Doctor's tenure. However, this is justified by having these Sontarans be a clone batch from the Time War, an element of the New series.