Mervyn Pinfield
From Tardis Wiki, the free Doctor Who reference
Mervyn Pinfield (28th February 1912-20th May 1966) was Associate Producer for Doctor Who from "An Unearthly Child to "The Romans." He also directed the stories "The Sensorites," "Planet of Giants," and "The Space Museum." His non-Doctor Who directing credits include The Monsters, The Franchise Affair, and Compact.
Before joining the BBC early in the 1950s to work on live drama at Alexandra Palace, he spent over four years in 'weekly rep' as Director/Theatre Manager at the Royalty Theatre, Morecambe. Pinfield was also known as the inventor of an early type of Teleprompter, or Autocue, which he called the Piniprompter.