Doctor Who—Flux, Chapter 2: War of the Sontarans
by Chris Chibnall (2021)
Flux evinces lessons learnt from the Key to Time season arc, embedding the big picture more cohesively within its component parts. Chapter 2 sees Dan go from strength to strength, and rehabilitates the Sontarans somewhat (though still playing them mainly for laughs).
Doctor Who: Doom Coalition
by Matt Fitton; John Dorney; Marc Platt; Edward Collier (Big Finish, 2015)
Doom Coalition introduces one of the most striking and original Who villains ever: the Eleven, a Time Lord with trans-incarnational dissociative identity disorder. Unfortunately, having featured in the first story, he subsequently becomes a background presence à la the Key to Time.