The Third Doctor and Jo

The era with Jo Grant is pretty extensive, as she had three TV seasons, more than Liz or Sarah, but it’s also extensive within Big Finish, because Katy Manning has been one of the more enthusiastic participants, voicing not only Jo, but Iris Wildthyme as well. Katy does a decent job of sounding like her younger self, and although not perfect, you get used to it quickly. In narrated stories, her version of the Doctor sounds...well, a lot like Jo trying to imitate the Doctor, so that’s fair. Jo always was kind of an odd fit within UNIT, and these stories vary from showing her as part of the UNIT team, to displaying her independent streak. The Doctor regained his ability to travel in the middle of this era, allowing Big Finish to nicely split stories set on Earth with stories on other planets. Most of the latter don’t have much UNIT in them, and feel more like traditional Doctor/companion stories. Katy has also worked on the Third Doctor Adventures series with Tim Treloar, helping to ease concerns about the recasting with her enthusiastic support, so most of those (thus far) appear in this era.