Career: Thaw's first professional job came at the Liverpool Playhouse. His film debut came in 1962's The Loneliness of the Long Distance Runner, which starred Courteney. Thaw worked extensively on stage with the Royal Shakespeare Company and National Theatre, and early TV roles came in Z Cars and Redcap. But it was The Sweeney, alongside Dennis Waterman, that made him a household name thanks to its uncompromising style. He switched to comedy with Home to Roost, but it was playing Inspector Morse that made him a national treasure. Almost everything he touched then turned to gold; he starred in top-rated dramas such as Kavanagh QC, Goodnight Mister Tom and Buried Treasure. He died in 2002 following a battle with cancer of the oesophagus.

Career: Whately's TV debut came in a 1979 episode of Shoestring. Two years later he had a six-week stint on Coronation Street. His big break came in 1983, when he landed the role of Neville in Auf Wiedersehen, Pet. In 1987, he made his first appearance as Sgt Lewis in Morse, and has since appeared in Peak Practice, the TV dramas Trip Trap, Gobble, and The Broker's Man, as well as Oscar-winning drama The English Patient. Other projects include Paranoid, Silent Cry, Murder in Mind, Purely Belter, Promoted to Glory and The Children. He's now the star of hit Morse spin-off Lewis.

Career: O'Neill's other stage credits include The Awakening, A Tribute to the Blue Brothers, Telstar, Midnight Cowboy, The Caretaker, A View from a Bridge, and The Ladykillers. A regular on the small screen, O'Neill's TV credits include Brookside, Pie in the Sky, Tom Jones, Heartbeat, Waking the Dead, Moving Story, Criminal Justice, The Bible, Uncle, Banana and Cucumber. On the big screen, his credits include Dancin' Thru the Dark (1990), Telstar (2008) and Frank (2012). In early 2015, he starred in the 35th-anniversary staging of Educating Rita at the Liverpool Playhouse.