Amazon.com description: Product Description: This range of two-part audio dramas stars Tom Baker reprising his most popular role as the Fourth Doctor (from 1974 -1981) with a number of his original TV companions. This fifth series reunites the Doctor with Romana (Lalla Ward), a fellow Time Lord for adventures across Time and Space! The TARDIS is going underground. When the Doctor and Romana find themselves buried beneath the surface of an alien world, they're soon swallowed up by a giant burrowing machine. This is where the inhabitants of this planet live - in huge, constantly moving, Drill-towns, chewing up the fuel and resources of the planet in order to survive. But something else lurks in the earth. Something that feeds on the Drill-towns. Something that is relentless and will not stop. The Silex are hunting. This pairing of the Doctor and companion Romana harks back to the most-watched period of Doctor Who, one that to a generation is the most loved and iconic and which broke the records for viewers of the show. Tom Baker's portrayal of the Fourth Doctor Who still tops popularity polls today.He was a special guest in 2013's 50th anniversary story Doctor Who - The Day of the Doctor and in 2016 was the subject of an extensive interview special read by the thousands of Doctor Who Magazine readers. CAST: Tom Baker (The Doctor), Lalla Ward (Romana) Matthew Cottle (Mr Maxwell Wilberforce Bell), Abigail McKern (Mrs Lucretia Bell), Robbie Stevens (Mr Jelicho Wigg/ Mr Wilfer Wagstaff), Jane Slavin (Miss Arabella Wagstaff/ Mrs Betsy Wagstaff), John Banks (Silex/ Mr Stoker).