Doctor Who’s upcoming story Circuit Breaker saga has some new additions, with a teaser about what lies ahead revealing another star from the series returning. Jo Martin as the Fugitive Doctor in Doctor Who. "The Doctor, Osgood and Andrew are joined by Kate Lethbridge Stewart. If that wasn’t enough, two audiobook mini-adventures called Circuit Breaker: Short Circuits – narrated by Sontaran actor Dan Starkey – are being added to the collection as well on 24 September. Here's full list of release dates for the Circuit Breaker Saga, and where to find them:Jemma Redgrave as Kate Lethbridge-Stewart in Doctor Who's The Legend of Ruby Sunday.