Big Finish Doctor Who audio spin-offs

In addition to the Doctor Who audio dramas featuring the Doctor, Big Finish Productions also produced audio dramas centred around other characters in the Doctor Who universe. Here is a list of the Big Finish spin-offs.

Ranges

Bernice Summerfield - The adventures of archaeologist Bernice Summerfield, former companion of the Seventh Doctor. It was succeeded in 2014 by The New Adventures of Bernice Summerfield.
Counter-Measures - The Intrusion Countermeasures Group from Remembrance of the Daleks fight alien and supernatural threats in the 1960s. It was succeeded in 2016 by The New Counter-Measures.
The Diary of River Song - The adventures of River Song, after her night on Darillium but before her trip to the Library.
Gallifrey - A political thriller set on Gallifrey, featuring Romana II, Leela and brand new characters such as Coordinator Narvin.
The Paternoster Gang - Investigations of the Paternoster Gang.
Torchwood - New adventures for Torchwood across history.
The War Master - Adventures of the Master during the Time War.

Charlotte Pollard - The adventures of Charlotte Pollard, former companion of the Eighth and Sixth Doctors and associate of the Viyrans.
Class: The Audio Adventures - New adventures centred around the Doctor Who spin-off Class.
The Churchill Years - Adventures of Winston Churchill and his encounters with the Doctor.
Graceless - Twin tracers Abby and Zara, who previously encountered the Fifth Doctor.
Iris Wildthyme - Transtemporal adventuress Iris Wildthyme traverses the universe in the Celestial Omnibus.
Jenny: The Doctor's Daughter - Adventures of Jenny following her debut in The Doctor's Daughter.
Lady Christina - Adventures of Christina de Souza.
The Lives of Captain Jack - Adventures of Jack Harkness.
Missy - Missy's exploits away from the Doctor.
Rose Tyler: The Dimension Cannon - Adventures of Rose Tyler in parallel universes.
Tales from New Earth - Adventures set on New Earth.
UNIT - An original UNIT team deal with threats both alien and human in the early 2000s. Following a Doctor Who special, it was succeeded in 2015 by UNIT: The New Series, featuring Kate Stewart, Osgood and a new UNIT team combating alien invasions in the 2010s.

Cyberman - Follows the Orion War in the 26th century, which involved the humans, androids and Cybermen.
Dalek Empire - Humanity fighting the Daleks across thousands of years.
I, Davros - Davros's rise to power, from childhood to the creation of the Daleks.
Jago & Litefoot - Henry Gordon Jago and Professor George Litefoot from The Talons of Weng-Chiang investigate infernal incidents in Victorian London.
Sarah Jane Smith - Sarah Jane's adventures following the Fourth Doctor returning her to Earth and A Girl's Best Friend.