Frederick was educated in Germany and France. He came to England in 1939 and took up acting at the suggestion of his English headmaster. He attended the Guildhall School of Music and Drama in London between 1946 and 1948 and started his stage career at preston Rep in 1949. Many rep seasons in provinces before West End appearances including 'The Comedy of Errors', 'Lock Up Your Daughters', 'The Potsdam Quartet', 'Big Fish, Little Fish', 'For Adults Only', 'A Patriot For Me', 'Mrs. Gibson's Boys' and 'Salad Days'. Frederick started his television career in 1955 and went into films in 1956. He continued to act in all strands of the profession until his death.
At the Fountainhead (Of German Strength)
(Kurt Langsdorf)
Cold Comfort Farm
(Doctor Adolph Müdel)
Indiana Jones and the Last Crusade
(World War One Ace)
St. Ursula's in Danger
(Mr. Forson)
Nijinsky
(Gabriel Astruc)
Scorpio
(Novins)
One of Those Things
(Melchior)
Song of Norway
(Henrik Ibsen)
The Looking Glass War
(Pilot)
Ice Cold in Alex
(2nd German Officer)
The One That Got Away
(German Prisoner)
The Seven-Per-Cent Solution
(Marker)
Doctor Who: Planet of Evil
(Sorenson)
Doctor Who: The Invisible Enemy
(Professor Marius)
Selling Hitler
(Fritz Stiefel)
The Black Tent
(Koch)
Play It Cool
(Male Receptionist)
The Passage
(German Major)
Der Abschlußtag
(Harry Day)
Probation Officer
(Norman Warren)
Slaughter Day
(Klaus)
Voyage of the Damned
(Werner Mannheim)
Winterspelt 1944
(Major Robert Wheeler)
I Was Monty's Double
(Junior German Officer)
Pakbo
(Jim)
Doctor Who: The Savages
(Jano)
The Limbo Line
Home-Movies
(Keith Sayle)
The Potsdam Quartet
(Douglas Smedley)
Keeping Up Appearances
(Millburn)
The Sweeney
(Goldman)
Remington Steele
(Edvard Jensen)
Department S
(Major Harwood)
Doctor Who
(Sorenson)
Z-Cars
Shoestring
The Avengers
(Benson)
The Persuaders!
(Luther)
Jason King
Minder
(Inspector Klingmann)
Callan
Yes Minister
Dixon of Dock Green
(John Charles Walton)
Barlow
Doomwatch
(Richard Massingham)
The Hanged Man
(Hans Deiter)
The Doombolt Chase
Interpol Calling
(Bernarde)
The Adventures of Sir Lancelot
(Sir Christopher)
The New Avengers
(Jones)
One Step Beyond
(Johann)
Angels
Warship
Fall of Eagles
(Holstein)
Festival
(Kinesias)
Sir Francis Drake
(Vicary)
Amelia
ITV Play of the Week
(Bequeville)
Boy Meets Girls
I Woke Up One Morning
Detective
The Kenny Everett Television Show
(Self)
One-Upmanship
The Jazz Age
N.U.T.S.
The Chief
Doctor Who
(Professor Marius)
Graf Yoster gibt sich die Ehre
(Sir Adam)
Justice
(Wilkinson)
The Main Chance
(Peter Jarratt)
Return of the Saint
(Inspector Grant)
Pretenders
(Joachim)
Miss Marple: The Body in the Library
(Colonel Melchett)
Some Mothers Do 'Ave 'Em
(Mr Barker)
Miss Marple
(Colonel Melchett)
The Kenny Everett Television Show
(Various)
The Protectors
(Bergen)
The Professionals
(Schuman)