Jo Grant had no inkling of the ship that revolved in orbit like a discreet, preposterous thought in the mind of someone serene but bonkers.
High above London and its crust of smog, stretched tall above the soapy atmosphere of the Earth, is a ship the size and exact shape of St Pancras railway station.
On board, The Doctor and that mysterious lady adventurer, Iris Wildthyme, are bargaining for their lives with creatures determined to infiltrate the 1970s in the guise of characters from nineteenth-century novels.
Without the help of UNIT, The Doctor and his friends face the daunting task of defeating aliens, marauding robot sheep, the mysterious Children of Destiny and… The being who calls himself Verdigris.
- Verdigris was the thirtieth BBC Past Doctor Adventures novel. It featured the Third Doctor, Jo Grant and Iris Wildthyme. This was the first full length past Doctor novel to feature Iris Wildthyme. She had previously appeared in the full length Eighth Doctor novels The Scarlet Empress and The Blue Angel.
- Verdigris travels to the anti-matter universe and makes Omega aware of The Doctor (thereby leading to The Doctor being freed from his exile).
- Iris has an adventure in the Death Zone remarkably similar to The Doctor’s. (The Five Doctors)
- The Masterleaves Earth at the end of this story, having escaped from prison, (The Sea Devils) and aims for Skaro. (Frontier in Space)
- Iris mentions the occasion when the TARDIS fell off a cliff on Peladon. The Doctor says that that has not happened yet in his personal timeline. (The Curse of Peladon)
- Jo recalls being dragged to the future to face the Daleks, (Day of the Daleks) tussling with”fish people”, (The Sea Devils) being tied to an altar to be sacrificed to the Devil, (The Dæmons) facing”a malign alien