PC Andy Davidson is Gwen Cooper's former police partner, first appearing in "Everything Changes". He finds glamorous police programmes like CSI: Crime Scene Investigation ridiculous and also seemed to be somewhat put out by Gwen's more inquisitive nature.
After Gwen joins Torchwood, she meets him again outside a nightclub where a man has been killed by a "sex monster"-possessed host ("Day One"). Like Gwen's boyfriend Rhys Williams, he believes that she has been promoted to "Special Ops".
PC Andy returns in "End of Days", requesting Gwen's help after a Roman soldier has fallen through time only to murder two men and subsequently be arrested. Jack and Gwen talk very frankly about what has happened in front of him.
In the second series debut, Kiss Kiss, Bang Bang, he is presant after a man is killed by Time Agent Captain John.
