After a very encouraging start, and with a powerful historical episode (undercut by an unnecessary and one-dimensional villain), it's been a disappointing downhill spiral for nuWho's 11th season, thanks - it seems - to showrunner Chris Chibnall's inability to spin a good sci-fi yarn.
As I've been saying all along, Jodie Whittaker is a powerful force as the latest iteration of The Doctor, and Team TARDIS (Bradley Walsh's Graham; Tosin Cole's Ryan; and Mandip Gill's Yasmin) are a fascinating bunch.
They continue to remind me, thematically, of the makeup of the First Doctor's original travelling companions, similarly accidentally 'abducted' by The Doctor, but when given the option chose to continue their adventures in the TARDIS.
The weakness begins and ends with the stories they are thrown into and and, worryingly, Chibnall's behind this week's The Tsuranga Conundrum as well, so I wasn't optimistic.
However, in this case, my fears were unfounded.
The Doctor and her friends are injured when they set off a sonic mine on a scrap planet, and wake up on a largely automated hospital ship ferrying its patients to a space station... a long way away from the planet where The Doctor left her TARDIS.
The ship is boarded by a hostile alien creature and it's up to The Doctor to rally her friends, the last surviving medic, Mabli (Lois Chimimba), and the patients - pregnant Yoss (Jack Shalloo), and a stubborn starpilot Eve Cicero (Suzanne Packer), her brother, Durkas (Ben Bailey-Smith), and her android assistant Ronan (David Shields) - to save the ship and get it to its destination before the creature destroys it or its self-destruct mechanism activates!
The ravenous P'ting is a disturbingly adorable cross between Matter-Eater Lad, a furless teddy bear, and the Xenomorph from Alien.
I suspect some elements of Who fandom will poo-poo the creature as "too cutesy" and dismiss it out of hand, missing the whole fear factor of twisting cute things into "The Other", a staple of the horror genre.
Although obviously derivative in its set-up and reasonably predictable in its outcome, The Tsuranga Conundrum is a clever and intricately plotted adventure, that gives all our heroes a chance to shine.
It was also a marked improvement over recent episodes this season, while lacking the historical weight of Rosa, it gave us a bizarre and memorable antagonist worthy of a Doctor Who story, genuine jeopardy, a variety of engaging sub-plots, and a satisfactory resolution to all these threads.
With Yoss's birth and the relationship between Eve and Durcas, as well as several exchanges among the members of Team TARDIS, it's clear that the theme of "family" - a large part of all the episodes to date- is a strong element in this season.
This makes me wonder if it's building towards some deep dive into The Doctor's family tree for its season finale? Will our female Doctor be reunited with her granddaughter, Susan, in this very First Doctor-ish run of new adventures?
You just have to look at the trailer for the next episode to see the emphasis on family again...