Doctor Who: The Kairos Ring by Stephen Gallagher; read by Steven Pacey (BBC Audio, 2021) A novelette that would have benefited from a longer treatment. Gallagher is an accomplished writer peddling a nifty idea, but Romana has too little involvement (especially for a Doctor-less story) and the threat, having been built up, is vanquished rather too easily.
Doctor Who: The Paradox Planet by Jonathan Morris (Big Finish, 2016) Disappointingly, this story is not self-contained but rather one of a separately issued brace. The titular paradox, though inventive, is thus hard to gauge. Character-wise, Romana seems overly supercilious and the Doctor a bit too faux-affable (yet without the underlying moral authority).
Doctor Who: The Thief Who Stole Time by Marc Platt (Big Finish, 2017) A wildly imaginative audio drama that successfully sacrifices exposition for immersion (assuming it is meant to stand alone). While Tom Baker cruises and Lalla Ward adds depth to Romana, Sartia (Joannah Tincey) emerges as one of the audio series’ more endearing villains.