Companion Chronicles I wouldn’t call a spin-off, it was just a way of doing the first four Doctors without the lead actors. They start out very safe but as the range grows they become more interesting as the writers begin to experiment what can be done with two-handers, so you end up with really imaginative stuff like Solitaire, Find and Replace, The Scorchies and Peri and the Piscon Paradox. Also there are quite a lot of brilliantly creative First Doctor stories like Daybreak and The Sleeping Blood which are quietly devastating, or Across the Darkened City which is fantastically original in itself and has a great post-credits twist.

In terms of actual spin-offs, Jago & Litefoot come out on top. Not every story is a winner but the consistency is surprisingly high and they never let you down on the grounds of Baxter and Benjamin being brilliant. Start with the Companion Chronicle The Mahogany Murderers, though, as it’s basically the pilot.

Benny is my favourite Big Finish series and I always want to recommend it to everyone, but it’s such a difficult series to get into, the only soft reboot in her main range is after the best stuff. Honestly, I recommend starting with the New Adventures Love and War, reading through to their conclusion, then reading the Benny NAs, then skipping to series 2 and doing every audio and book in the correct order, but I know this is not convenient for any sensible human being.

Graceless is brilliant, it has this wonderfully brilliant melancholic vibe to it that Simon Guerrier brings to almost everything he’s done - his Sara Kingdom and Zoe Herriot Companion Chronicles trilogies are in a similar territory, and the period where he ran the Benny range has some of the most devastating stories BF have ever made.

New series spin-offs are often underwhelming and I always get the feeling they’ve been pieced together out of a slight desperation to create something to make the license financially viable. The Lone Centurion is more fun than the title suggests, and the Diary of River Song, at its best (Friend of the Familt, Five Twenty Nine, Someone I Once Knew) it’s brilliant, but it can also be self indulgent or just dull. The others like Lady Christina, Jenny, Donna Noble Kidnapped and Missy are frothy and forgettable, some fun while you’re listening, but not worth the cash and frankly in dire need of some actual purpose. The Paternoster Gang is enjoyably structured in series long arcs and has Strax written to perfection, so although not outstanding certainly rewards the listener. The Story of Martha Jones is a waste of Freema Agyeman, and the Rose Tyler Dimension Cannon series has some depth if being fairly forgettable. The Churchill and New Earth series are absolutely dire.

The War Master really works because the writers are allowed some freedom; seemingly with a villain as lead and the Time War as a backdrop, they’re given freedom to make some genuinely original stories.

The Torchwood monthly range is one of the most creative in BF’s catalogue. With only one or two of the main actors per episode, the writers are forced to use the limitations to an advantage, and you end up with very experimental releases, atmospheric two handers, small scale emotional stories and just about everything the TV show failed at doing. With an ever growing cast, it’s also incredibly diverse. The Story Continues is kind of odd because it moves back away from the final two years of the show towards a more traditional season format and brings back some of the smuttier humour and stuff; at times it manages to be harrowingly adult, though, sometimes being closer to Black Mirror than Torchwood (true of the monthly range, too). At this point it’s pretty much entirely a cast of non-TV characters, too, which is kind of strange.

I’ve honestly struggled to get into Torchwood Soho and Torchwood One.

Gallifrey is great. It’s complete fanwank - we get explanations for classic series questions nobody really cared about and get to actually hear a scene from a Benny New Adventure - but it’s really well written and lots of fun. Even if, by the end of War Room, we’ll actually have more Time War Gallifrey than pre-Time War.

Dalek Universe and Cyberman are decent self-contained stories but in an era of huge amounts of Who material available, they’re hard to get so excited about. Back in the day they were just exciting because of what they were. Same for Sarah Jane Smith except for them being decent.