
Acting
Oliver John MacGreevy (25 July 1928 – October 1981) was an Irish actor who appeared in many British films and television series from the mid 1950s until he retired in 1980, often as brutish, shaven-headed villains.
Among his roles he played Housemartin in The Ipcress File (1965) and made an appearance as both the Gardener and the Electrician in the first episode of The Prisoner TV series ("Arrival", 1967). He also appeared in an episode of Thriller (1975).
On stage, he appeared in Tom Murphy's A Whistle in the Dark at Joan Littlewood's Theatre Royal, Stratford East, in London, 1961.

Flash Gordon
as Klytus Observer No. 1

No. 1 of the Secret Service
as Simms

Where the Action Is
as Henry

The Four Musketeers
as Headsman (uncredited)

Tales from the Crypt
as Maniac

The Ruling Class
as Inmate
Thrills Galore
as Landlord

When Eight Bells Toll
as Quinn

The Nine Ages of Nakedness
as Hargreaves (segment "The Old Dark House")

Salt & Pepper
as Rack

Thriller
as Henry · 1 ep.

Jason King
1 ep.

Department S
as Karnack · 1 ep.

The Prisoner
as Gardener / Electrician · 1 ep.

Mystery and Imagination
as Finn · 1 ep.

Gideon's Way
as The Contact Man · 1 ep.

Thirty-Minute Theatre
as Landlord · 1 ep.

Theatre 625
as Terry Flynn · 1 ep.
Six
1 ep.
Festival
as Barney Doran · 1 ep.
The Ruling Class
1972