Harry (An Adventure in Space and Time)
From Tardis Wiki, the free Doctor Who reference
Harry was a security guard at the British Broadcasting Corporation television centre in the 1960s on Earth.
He was in his old age and wore a well kept uniform. He would often talk to people that entered the centre. (DOCUDRAMA: An Adventure in Space and Time)
Behind the scenes
In the real world the character never existed and was added so William Russell could appear.
