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: At 16, Waterman returned to Britain and concentrated on stage work until an acclaimed performance in 1968's Up the Junction led to more film roles. Low-budget movies (such as Scars of Dracula) and TV shows (including Colditz) followed until, in 1974, he co-starred with John Thaw in Regan, the pilot episode of iconic series The Sweeney, which became a major TV hit. A 10-year stint in comedy drama Minder followed. Other projects include TV shows On the Up, Stay Lucky, and Circles of Deceit. He's also worked on the stage, most notably in Jeffrey Bernard is Unwell, and My Fair Lady. As Gerry Standing, in BBC drama New Tricks, he has introduced himself to a new generation of fans.

Career: Blessed started out on the stage, but gained fame playing Fancy Smith in Z Cars from 1962 to 1965. He's rarely been out of work since and has tackled a wide variety of roles on TV, stage and in films. Among his most memorable projects are Henry VIII and his Six Wives, I, Claudius, Flash Gordon, The Black Adder, Henry V, Much Ado About Nothing and Hamlet. More recently, he featured in Star Wars Episode One: The Phantom Menace and Oliver Stone's Alexander. In 2014, he was the subject of an edition of Who Do You Think You Are? He is in constant demand for voiceover work.

Career: Brown has had a long TV career, and in the 1970s took roles in Coronation Street, Doctor Who, Angels and Survivors. She has been actively involved in the theatre and is recognised as a great Shakespearean actress - but only became a household name when she joined the cast of EastEnders in 1985. She took a break from the soap in 1993, but Dot Cotton returned four years later and has stayed there ever since. Away from the Square, Brown has appeared in the movie Bean, and played Nannie Slagg in the BBC's big-budget production of Gormenghast in 2000.