Jonathan Newth
Credits include: "Emergency Ward 10" , "The Six Wives of Henry VIII" , "Ace of Wands" , "The Troubleshooters" , "Z-Cars" , "Callan" , "Van der Valk" , "The Brothers" , "Softly , Softly" , "Poldark" , "Doctor Who" ( "Underworld" ) , "Notorious Woman" , "Secret Army" ( Barsacq ) , "The Professionals" , "The Nightmare Man" , "The Day of the Triffids" , "Tenko" ( Colonel Clifford Jefferson ) , "Triangle" , "Angels" , "Juliet Bravo" , "After Henry" , "The Adventures of Sherlock Holmes ( The Bruce-Partington Plans ) , "Boon" , "Bugs" , "The Bill" , "Agatha Christie's Poirot ( Dumb Witness ) " , "Peak Practice" , "Heartbeat" and "The Spire ( Play at Sailsbury Cathedral ) " . 
<triplet> Underworld <subj> Doctor Who <obj> part of the series