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Niall MacGinnis was an Irish actor who made around 80 screen appearances.

Jason and the Argonauts
Zeus
72

49th Parallel
Vogel
69

Hamlet
Sea Captain
74

Anna Karenina
Konstantin Levin
59

Night of the Demon
Dr. Julian Karswell
70

The Spy Who Came In from the Cold
German Checkpoint Guard
71

The Viking Queen
Tiberian
46

Lust for Life
Roulin
72

Helen of Troy
Menelaus
62

The War Lord
Odins
61

Kidnapped
Mr. Shaun
65

Tarzan's Greatest Adventure
Kruger
53

The Edge of the World
Andrew Gray
72

Becket
Baron
71

Never Take Sweets from a Stranger
Defense Counsel
73

Krakatoa, East of Java
Harbor Master
59

The Prince and the Pauper
Father Andrew
71

Betrayed
Blackie
56

Martin Luther
Martin Luther
71

The Man Who Finally Died
Brenner
62

The Kremlin Letter
Erector Set
60

Sword of Sherwood Forest
Friar Tuck
60

Behind the Mask
Neil Isherwood
60

The Truth About Spring
Cleary
67

A Man Could Get Killed
Ship's Captain
38

Captain Boycott
Mark Killain
68

Murder in the Cathedral
Herald
65

Sinful Davey
Boots Simpson
51

Chance of a Lifetime
Baxter
63

Conflict of Wings
Harry Tilney
60

River of Mystery
Garwood Drum
0

The Devil's Agent
Paul Vass
64

Tawny Pipit
Jimmy Bancroft
62

Island of Terror
Mr. Roger Campbell
58

Alexander the Great
Parmenio
60

Hell Below Zero
Dr. Howe
66

Foxhole in Cairo
Radek
55

Torture Garden
Dr. Silversmith (segment 1 "Enoch")
61

The Crimson Circle
Jack Beardmore
48

Talk of a Million
Tom Cassidy
0

The Shiralee
Beauty Kelly
49

No Room at the Inn
O'Rane
70

Shake Hands with the Devil
Michael O'Leary
65

Undercover
Dr. Jordon
58

The Day Will Dawn
Olaf
56

East of Piccadilly
Joe
55

Ourselves Alone
Terence Elliott
50

Henry V
Macmorris - Captain in the English Army
66

Knights of the Round Table
Green Knight
60
Jack the Ripper
Walter
60

The Nun's Story
Father Vermeuhlen
71

A Face in the Rain
Klaus
0

A Terrible Beauty
Ned O'Neill
49

Billy Budd
Captain Nathaniel Graveling
73

Diamond City
Hans Muller
52

This Other Eden
Brendan Devereaux
60
The Hundred Pound Window
Chick Slater
0

Johnny Nobody
Defending Counsel Sullivan
65

Debt of Honour
Lt. Peter Stretton
0

The Demi-Paradise
Man on Ship-Dedication Stand
63

The Shoes of the Fisherman
Capuchin Monk
67

The Webster Boy
Headmaster
0

We Dive at Dawn
Torpedo Gunner's Mate - C / P.O. Mike Corrigan
64

No Highway in the Sky
70

Christopher Columbus
Juan de la Cosa
57

The MacKintosh Man
Warder
61

She Didn't Say No!
James Casey
63

Turn of the Tide
John Lunn
70

The Luck of the Irish
Derek O'Neill
0

Special Delivery
Sidney
0

In the Nick
Prison Governor
0