The third and final instalment in the trilogy of 3D9C and 4D12C / Adventures through spacetime are balanced with the domestic lives of the usual cast of mismatched characters while they thwart intergalactic, cross-temporal, supernatural adversaries; everything ranging from killer space-squids to cults to parasitic toilet worms to invisible aliens and much more.

Spin-off to "4 Doctors, 12 Companions, What Could Possibly Go Wrong?" The procedural paranormal adventures of Sally Sparrow, conspiracy theorist extraordinaire, and Esther Drummond, the ex-CIA, ex-dead Lightning Girl, as they houseshare and solve mysteries.

The second part of the "3 Doctors, 9 Companions" saga, carries on directly. The universe is still tearing apart and leaving Doors allowing for cross-dimensional travel. Introduces a female Doctor, a psycho synth, twin realities, a useless vampire, Sally Sparrow and a conspiracy to resurrect dead Torchwood members. Everybody has superpowers, and things get sort of gay.

As the fabric of the universe crumbles, the TARDIS crew over 300 years are pulled back to the ship and are forced to live in close quarters and get along while going on daily, episodic adventures in between the domesticity. Stars Nine, Ten, Eleven, Rose, Jack, Mickey, Martha, Donna, Amy, Rory, River, Clara and later Jenny, Tentoo, Oswin Oswald and Adam Mitchell. [Improves With Age]

3D9C spin-off set between Chapters 236 and 237. In the chaos of the Prank War, an EMP disables Oswin's hologram and her connection to Clara and sends them both into a dream-like coma full of impossible scenarios and twisted versions of their friends, with the same goal every time of aiding a new Echo while slowly becoming best friends and pseudo-twin sisters.