Investigative journalist Sarah Jane Smith and freelance UNIT operative Harry Sullivan once travelled the stars with each other and their friend the Doctor. Now they’re back on Earth, the adventures are only just beginning… 

Smith and Sullivan is a brand-new full-cast audio drama series starring Sadie Miller (daughter of original TV actress Elisabeth Sladen) as Sarah Jane Smith and Christopher Naylor as Harry Sullivan. They're joined by John Leeson as robotic companion K9 and Annette Badland as Sarah’s Aunt Lavinia. 

The events which bring Sarah and Harry back together kick off the first Smith and Sullivan box set, Reunited. After joining forces once again, they set about solving mysteries across 1980s Britain, including a spate of odd deaths in phone boxes and a wealthy inventor with a most unusual ally. 

The Worlds of Doctor Who – Smith and Sullivan, Reunited is now available to purchase as a digital download to own for just £19.99, exclusively here.

Sarah and Harry’s three new cases are: 

The Caller by Tim Foley 

As the government prepares to sell off the telecommunications network to the highest bidder, including Starling Industries, Sarah investigates a spate of unexplained deaths in phone boxes across the capital. Elsewhere, Harry is vetting the bidding companies on behalf of UNIT, delighted when the assignment converges with his old friend – and her robot dog! 

Sarah and Harry realise they are investigating the same thing – why is government minister Sir Gordon Carmichael covering up the ‘phone box murders’, and what alien power is Violet Starling preparing to unleash? 

Union of the Snake by Roland Moore

Self-made millionaire Eric Chen inexplicably went from working in a sawmill to designing a revolutionary computer chip that has made billions. He had no training or education in electronics. How did he do it? 

His new PA – Sarah Jane Smith – is determined to find the answer. 

Blood Type by Simon Guerrier

Busier than ever with so many cases, Sarah has little time to write up her cases for publications. But taking shortcuts risks making mistakes, as a journalist and as an investigator. 

When an old adversary reappears, the pressure reaches boiling point. But can Sarah rely on her closest friends in this crisis? 

Smith and Sullivan, Reunited also features Rosie Baker as Violet Starling/The Caller, Graham Seed as Sir Gordon Carmichael, Chris Lew Kum Hoi as Eric Chen, Marcia Lecky as Veronica Hyde, Daon Broni as Derren Burrows/Medworth, George Naylor as Roy Kitt, and Sarah Moyle as Brenda Gough. 

Sadie Miller said: “When a project as good as this happens, there are so many possibilities and it’s so exciting. To be able to get to do it is a dream. Sarah’s finding her feet after the Doctor, going back to being a journalist. It’s really fun to explore that time, seeing what’s happened to Sarah, who she is, and what she’s getting up to. 

“Sarah adores Harry and, for a woman of her time, she loves that she can actually boss him around a little bit, but that he takes her seriously. They have a genuine relationship where they really care about each other, but where they’re each allowed to stand on their own as individuals.” 

Christopher Naylor added: “Harry’s gone back to UNIT, but on a more freelance basis. He’s quite happy back at home again. And then Sarah explodes into his life yet again and changes all that. A whole new world of opportunities and perils opens up for him. 

“It’s just nice to be at the heart of everything and to have this lovely team assembled around us, with Aunt Lavinia and K9. I can really feel we’re stamping our identities on it.” 

The Worlds of Doctor Who – Smith and Sullivan: Reunited is now available to purchase as a digital download to own for just £19.99, exclusively here.

All the above prices (including pre-order and multibuy bundle discounts) are fixed for a limited time only and guaranteed no later than 30 September 2025. 

SALE! For a very limited time, audio adventures featuring Sarah Jane Smith and Harry Sullivan are discounted up to 50% off. Click here to browse the deals. Hurry! These offers expire no later than 23:59 (UK time) on 27 July 2025.