This is just a quick note from the BBC report.
Derek Martinus, who directed some of Doctor Who's best known episodes between 1965 and 1970, featuring the first three Doctors, has died aged 82.His family told the BBC he died on Thursday evening having suffered from Alzheimer's for many years, calling him "an inspiration" and an "amazing man".
Martinus directed the introduction of the Cybermen in The Tenth Planet.
The four episodes culminated in first Doctor William Hartnell regenerating into Patrick Troughton.
He also directed the first ever Doctor Who episodes to be made in colour, the Spearhead from Space serial - which introduced third Doctor Jon Pertwee - as well as The Ice Warriors serial.
His career took in several other long-running series such as United, Z-cars, The Doctors, Angels, Blake's 7 and Penmarric.
There's more at the BBC link. Here's a clip from "Spearhead from Space".