In the 1962–63 television season of
Our Man Higgins, Holloway was cast in his first major acting role as Quentin in four episodes. In the 1970s British police drama
The Sweeney episode
Big Spender, Holloway appeared as John Smith, the brains of an
organized crime family who involve themselves with two dishonest employees of a car park company in an elaborate fraud. His other television credits included the
Uncle Silas television dramatisations,
Elizabeth R,
Remember WENN,
Whatever Happened To The Likely Lads,
Beverly Hills, 90210,
Minder,
The Professionals,
The New Avengers,
Z-Cars,
The World of Wodehouse, and the
Doctor Who story
Survival in 1989. His films included
Young Winston (1972),
Porridge (1979), ''
The Great Rock 'n' Roll Swindle (1980), A Christmas Carol (2009) and The Rum Diary'' (2011). Holloway developed a reputation as a successful voice artist / vocal artist, mainly in the United States. In 1991, he performed the role of Captain Zed in
Captain Zed and the Zee Zone and as Bradford Milbanks in
James Bond Jr.. He also voiced
Siegfried Fischbacher in the first season of
Father of the Pride (2004),
Prime Minister Almec in several episodes of
Star Wars: The Clone Wars (2008–2020), and Odlaw in ''
Where's Waldo? (1991 series). Holloway also performed as a vocal artist for video games including Pirates of the Caribbean: At World's End and Medal of Honor: European Assault. He provided the voice for Death in the Cartoon Network animated series Regular Show'' (2010–2017). ==Personal life and death==