Baker's tenure as the Doctor proved to be a controversial era for the series, which included a hiatus in production and his subsequent replacement on the orders of BBC executives.

His regular television work continued and in Fall of Eagles, Baker appeared as Crown Prince Wilhelm of the German Empire.

By far his most prominent role to date came in 1974, playing the ruthless banker Paul Merroney in the BBC Sunday evening series The Brothers.

According to PopMatters, "Colin Baker's first appearance was just out-and-out dislikable, showcasing a hubris and harshness that was heretofore unseen in the Doctor's emotional canon.

[9][10] One new Doctor Who story, Slipback, was produced for radio during the hiatus, which starred Baker and his regular television companion Nicola Bryant.

The season featured a reduction in episodes, was made entirely on video for location scenes and was produced as a 14-episode-long serial called The Trial of a Time Lord.

"[16] Baker was removed from the part after starring in only eleven stories and just short of three years in the series, including the hiatus, making his tenure as the Doctor the shortest at that point.

[6] In an interview in 2019, Baker expressed regret for not returning for the scene, stating that he was "brutally selfish at the time" and that he was not thinking about the fans.

[17] On 4 September 2011 at Riverside Studios, Hammersmith, London, Baker accepted the presidency of the Doctor Who Appreciation Society, which had previously been held by Jon Pertwee and Nicholas Courtney.

Baker has reprised the role on television only twice after his official run ended, in the 1993 Children in Need charity special Dimensions in Time alongside Pertwee, Tom Baker, Peter Davison and Sylvester McCoy, and in the 2022 special "The Power of the Doctor" alongside David Bradley, Davison, Paul McGann, McCoy and Jodie Whittaker.

In recent years, Baker has appeared on a number of DVD releases of his episodes, featuring in either "making-of" documentaries or commentaries.

From 2023 onwards, Baker hosts the Big Finish produced podcast Into the TARDIS, presenting the various audio stories broadcast in the series.

Since leaving Doctor Who Baker has spent much of his time on the stage with appearances throughout the country in plays as diverse as Peter Nichols' Privates on Parade, Ira Levin's Deathtrap, Ray Cooney's Run for Your Wife and Ariel Dorfman's Death and the Maiden.

In 2000 he appeared in Snow White and the Seven Dwarfs alongside actress Louise Jameson who had previously played the Fourth Doctor's companion Leela.

Other theatre appearances have seen Baker tackle the role of Inspector Morse in House of Ghosts[21] and a UK tour of The Woman in White.

Another standalone BBV drama entitled The Airzone Solution appeared in 1993 and featured former Doctor Who actors Jon Pertwee, Peter Davison and Sylvester McCoy.

Away from his Doctor Who work for Big Finish Productions (see above), Baker appeared in the audio dramas Sapphire and Steel: The Mystery of the Missing Hour and the 3 part Earthsearch Mindwarp.

Baker's film work over the years includes The Harpist (1999), The Asylum (2000)[22] and D'Artagnan et les trois mousquetaires (2005).

[24] With his second wife, Marion Wyatt, an actress, whom he married in 1982, Baker has four daughters: Lucy, Bindy (an accomplished singer), Lalla and Rosie.