Trying to get Cosmo off her tail, the Doctor makes a dangerous move with her TARDIS and ends up in the titular Dimension of Lost Things, a place where the things you lose from keys to yourself go. To find her way out, she has the help of explorer Sandy Irvine, space pilot Athelia, a squirrel-like alien and most importantly of all: herself.

Lisa McMullin closes out the Fugitive Doctor’s first box-set, a writer I’ve admittedly found to be quite hit and miss with her work on the Ninth Doctor Adventures range, but here she brings a story set in an abstract but well-crafted world with plenty of intrigue.

Jo Martin is doing double duty in this story, playing both the Fugitive Doctor and another version of herself who’s already been in this dimension for a whole year, there are a couple of small moments where it feels a little unclear which is speaking, but on the whole this works well and their interactions are both engaging and raise the story’s tension, as questions are raised about the Doctor’s lost memories and finding the answers.

It is hard to discuss in much detail without going into spoiler territory, but there are brief scenes depicting fragments of past events in the Fugitive Doctor’s life. One of these is particularly tense due to a mix of both Jo Martin’s delivery and the incredibly evocative sound design. Additionally, with later revelations of the story in mind, it raises more questions for the audience about just how many layers to the Fugitive Doctor’s situation there are.

The Dimension of Lost Things itself has some interesting locales, with lost souls roaming that seem to drag others down with them, and winds that blow away your memories and this is a story that leaves you wanting more of its world, as unlikely as a return visit may be.

Sandy Irvine feels a little wasted in this story as a historical figure, not being a particular focus of the story and spending much of it simply following the Doctors and reacting. While not an inherent fault, it would have been nice if he had gotten more to do. Though the story does have two important moments for the character which were enjoyed.

Cosmo - having debuted back in Fast Times - finally gets her chance to shine here. While in execution it doesn’t feel wholly satisfying, with the story starting with them sounding so familiar to one another whereas from a listener perspective they haven’t interacted since their first meeting, she’s a very enjoyable character who will hopefully be further explored in future episodes. The way she favours working alone is an interesting mirror to the Doctor at this stage and the interactions she does get with the Doctor are very enjoyable, where this dynamic evolves will be interesting to see.

If you’re looking to explore a strange new world and venture into the mysteries of the Fugitive Doctor, complete with cleverly executed revelations that don’t give away too much but leave you hungry for more, The Dimension of Lost Things may just be the story for you.