Acting
Ian Gordon Arthur Collier (25 January 1943 – 1 October 2008) was a British actor. Collier appeared on stage in Tony Richardson's production of Hamlet in 1969 at London's Roundhouse, and at the Lunt-Fontanne theater in New York City. Other repetory work includes appearances in Barrow-in-Furness and Liverpool, as well as the Royal Shakespeare Company. He also appeared in various television programmes including Rentaghost, Hi-de-Hi! and Howards' Way as well as in the Doctor Who serial The Time Monster. Collier portrayed the villain Omega in the Fifth Doctor serial Arc of Infinity and later in the Big Finish Productions audio drama Omega. He played Bernice Summerfield's father, Isaac Summerfield, in Death and the Daleks, and he guest starred in the Big Finish Productions Doctor Who audio drama Excelis Decays. Among his other television appearances was a guest part in an episode of Are You Being Served? in 1985. Collier's film credits included roles in Hamlet (1969), The Next Man (1976), A Nightingale Sang in Berkeley Square (1979) and Heritage Africa (1989).[10] Collier died on 1 October 2008 of unspecified causes.

EastEnders
1985

Doctor Who
1963

Minder
1979

Keeping Up Appearances
1990

Bergerac
1981

All Creatures Great and Small
1978

The Sweeney
1975

Jeeves and Wooster
1990

Howards' Way
1985

Return of the Saint
1978

The Duchess of Duke Street
1976

Target
1977

Rentaghost
1976

Danger UXB
1979

House of Cards
1990

Cribb
1980

Rockliffe's Babies
1987

Shades of Darkness
1983

Rebecca
1979

The Next Man
1976

A Nightingale Sang in Berkeley Square
1980

The Happy Valley
1987

Doctor Who: The Time Monster
1972

Doctor Who: Arc of Infinity
1983

Shift Work
1986

The Ties That Bind Us
2008

Heritage Africa
1989

Thin Air
1988

The Lady's Maid's Bell
1983

The Doctors: Villains!
2018

Young Shoulders
1984

The Omega Factor
2007