Andy Davidson

Sgt Andy Davidson was Gwen Cooper's former police partner, and by 2011 held the rank of police sergeant.

Early life
Andy Davidson worked with Gwen Cooper when she was a police officer. Andy had a crush on her, which made him jealous of Gwen's boyfriend and eventual husband, Rhys Williams. (TW: Adrift)

Encounters with Torchwood
After Gwen had joined Torchwood Three, she met Andy outside a nightclub where a man had been killed by Carys Fletcher, who was possessed by the Sex Gas. (TW: Day One) Like Gwen's boyfriend Rhys, he believed that she had been promoted to "Special Ops". They met at the scene of Guy Wildman's death. (TWN: Another Life)

During the opening of the Cardiff space-time rift, he requested Gwen's help after a Roman Soldier had fallen through time only to murder two men and subsequently be arrested. Jack and Gwen talked very frankly about what happened in front of him. (TW: End of Days)

Andy was present at the murder scene of a man who was killed by Time Agent, John Hart. (TW: Kiss Kiss, Bang Bang)

Andy lassisted Gwen with her investigation of a sudden disappearance. During this, he revealed his affection for her and jealousy toward Rhys, which Gwen discovered was his reason for not attending her recent wedding. (TW: Adrift)

He was also made aware that Gwen worked for Torchwood and showed interest in joining, but Gwen did not want him to. (TW: Adrift) Later, Andy called upon Gwen for assistance when Weevils began attacking his police station and despite his jealousy over Gwen, worked closely with Rhys. (TW: Exit Wounds)

The 456 Incident
He was at the aftermath of the bomb inside Captain Jack Harkness which destroyed part of Cardiff Bay. He also helped Johnson find Gwen Cooper, being told she was a terrorist, by taking her to Gwen's flat. Gwen shot out the truck's tires and escaped with Rhys. (TW: Children of Earth: Day Two)

Andy joined in the riot against the army to protect the children. (TW: Children of Earth: Day Five)

Miracle Day
Following the events of (and possibly due to his actions during) the 456 incident, Andy was promoted to Sargeant. After Gwen and Rhys went into hiding, Andy phoned Gwen to tell her that her father had been hospitalised. Later, he was forced to assist Rex Matheson in extraditing Torchwood 3 to America. (TW: The New World)

He accompanied Gwen and Rhys to the Cowbridge Overflow Camp, remarking that though the system was "bloody chaos, at least it works". He tried to have Geraint Cooper released, claiming his removal was under police orders but was unsuccessful as the overflow camps were not in the control of the Welsh police. (TW: The Categories of Life)

Along with a Police AFO team, Andy helped save Gwen's family. Andy shot a man in the head, remarking that it was the first time he had ever shot anyone. (TW: Immortal Sins)

After Gwen's father was taken back to the overflow camp, Andy used his status as a police officer to bring Rhys into the camp. While Rhys talked to Geraint, Andy sat with a young category one girl, whose name was not known. (TW: The Blood Line)

Personality
Andy found glamorous police programmes like CSI: Crime Scene Investigation ridiculous, and seemed to be somewhat put out by Gwen's more inquisitive nature. (TW: Everything Changes)

He was a pushover when it came to Gwen Cooper. Because he fancied her and was jealous of Rhys Williams, he did not attend her wedding. (TW: Something Borrowed)