Callum Stone is a fictional character from the British police procedural television series The Bill, played by Sam Callis.

Callis had previously appeared in the series during 2004, in a guest role playing the character of Karl Radford.

Writers created a rivalry between Callum and Police Inspector Dale "Smithy" Smith (Alex Walkinshaw) from his introduction.

In 2008, Young revealed that his writing team would fully explore Callum's contentious policing routines.

Callum's final stories explore his backstory, in which he attempts to expose his deceased father's criminal past and reconnect with his estranged family.

It was revealed that Callum is a Sergeant in the British police force and would be "independent and courageous" with "his own moral code and a strict sense of justice.

"[1] Of his casting, Callis stated that he was "extremely excited" to play Callum because he is a "terrific character and something I can really get my teeth into."

Callis had previously had a guest role in The Bill, playing an alcoholic priest called Karl Radford during episodes broadcast in 2004.

"[8] Callis told a reporter from Manchester Evening News that he enjoyed playing Callum because of his ambiguous persona.

[9] Callis believed he would be "a terrible policeman" and would never want to experience Callum's work life, despite his portrayal.

[3] Callis told an Inside Soap reporter that Callum makes it known that he will be "loyal and protective" of anyone who supports him.

Smithy is unaware of Callum's identity, who is wearing plain clothes and is "embarrassed" upon discovering he has pinned down his new colleague.

"[3] Callis added that Callum behaves "all arrogant when he turns up" and Sun Hill police station is "Smithy's turf", which makes an ideal conflict.

[8] Gutteridge revealed that Emma initially views Callum as the "serious sergeant type" but gains more insight into his personality via her friendship with PC Sally Armstrong (Ali Bastian).

[12] Callis told Allison Maund from Inside Soap that his character views the fake medics actions as "heinous" and is determined to find him.

"[9] In June 2008, The Bill's executive producer Johnathan Young told Kris Green from Digital Spy that Callum would continue struggle with his morality.

The story begins after Kim Yates (Lorraine Stanley) is questioned by police and later drives her car into a river.

The plot served to show Callum and Sally's continued unorthodox policing style, as they defy orders not to enter the river from their superior Inspector Gina Gold (Roberta Taylor).

A publicist from The Bill told a reporter from Evening Standard that "Gina wants them to wait for emergency services - but neither will listen.

"[15] In 2009, producers decided to revamp The Bill, turning the show into a new once-a-week and hour long drama with a grittier style and tone.

[16] Callis told a BBC News reporter that the new late night timeslot would allow him to produce better acting on the show.

The story formed part of the show's continued commitment to exploring Callum's unorthodox policing style.

Callum chooses not to inform his colleagues about his father's death and continues to work without compassionate leave.

He had been accused of sexual assault twenty years prior, but Callum had never been able to convince his mother of Phillip's guilt.

[20] Discussing his departure from the role, Callis stated that it was a "tough" situation because of the multiple job losses.

"[21] Jason Steger from The Sydney Morning Herald reviewed the show's finale and opined that Callum and Smithy reached "some kind of rapprochement" despite there being "no sign here of emotional problems" in the episode.

[20] Laura-Jayne Tyler from Inside Soap branded Callum a "maverick cop" whose personality never changed.

She assessed that "since joining the Sun Hill squad back in 2007, Sgt Callum Stone has never been afraid of bending the rules to help bring criminals to justice.

"[10] A television critic from Irish Independent opined that Callum "makes an instant impact" upon his introduction into the series via his confrontation with a drunk criminal.