Russell first performed before an audience in 1960 on The Shari Lewis Show, but it was not until 1980 that he had his first real acting job – performing on the London stage as the superintendent in Nobel Prize-winner Dario Fo's satire Accidental Death of an Anarchist, about police corruption in Italy. The reviews were good, and he reprised that role for television in 1983. After further honing his skills in various British TV productions and a handful of films – including Jute City, The Power of One, The Hawk and Seconds Out – Russell received exposure before international audiences as Caleb Garth in the celebrated BBC miniseries Middlemarch, based on the George Eliot novel of the same name. A year later, he fell in love on the movie screen with Helena Bonham Carter in Margaret's Museum, for which he earned a Genie nomination at the 16th Genie Awards for Best Performance by an Actor in a Leading Role. After more TV roles and another film, Russell played Ralph Fiennes' father in another critically acclaimed film, Oscar and Lucinda. Growing recognition of his acting skills then brought him major roles in four major TV miniseries: Great Expectations, Oliver Twist, The Railway Children and The Mists of Avalon.
In 2016, he joined the cast of Hollyoaks as Billy, brother of established character Jack Osborne[8]
In January 2017 he had a small role in the BBC Three comedy "Uncle", portraying Sam and Andy's father and later in the year appeared in Doc Martin. He played Ken Hollister.
In 2020, he appeared as Wroth, Chief of a Fey tribe called the Tusks, a recurring character for 5 episodes in the Netflix series Cursed.[9]