Iron Bright (audio story)

 was the two hundred and thirty-ninth story in Big Finish's monthly range. It was written by Chris Chapman and featured Colin Baker as the Sixth Doctor.

Publisher's summary
It's London, 1828, and the father-and-son team of Marc and Isambard Kingdom Brunel are masterminding a dangerous project - the digging of the Thames Tunnel. There's just one problem...

The Brunels' tunnel is haunted. Every night, a spectral blue lady walks the excavation.

Now, the 22-year-old Isambard, eager to step out of his famous father's shadow, finds himself dealing with not only the supposed supernatural, but a second unexpected guest - a colourful trespasser who calls himself 'the Doctor'.

Isambard would like to know a great deal more about this strange man and his mysterious blue box...

Plot
to be added

Cast

 * The Doctor - Colin Baker
 * Isambard Kingdom Brunel - James MacCallum
 * Marc Brunel - Christopher Fairbank
 * Tan - Catherine Bailey
 * Rispa/Lady Raffles - Imogen Church
 * Flo Hawkins/Alayna - Becky Wright
 * Richard Beamish/John Chubb - Anthony Townsend
 * Charlie/Lord Raffles/Captain Sanderson - Sam Woodward
 * Tour Guide/Scientist - Richard Urwin

Continuity

 * The Doctor collects Brunel's business card, which he puts with his collection of cards from "geniuses". (TV: The Two Doctors)
 * The Eighth Doctor later met an alternate version of Isambard Brunel. (PROSE: Reckless Engineering)