Before coming to Cardiff, Tyler went to prison for hacking pop stars including Katie Price and posting their photos online. In Cardiff, searching for the next big scoop, he was investigating the incident with refugee doors "accidentally" painted red. His investigation attracted the attention of both the Sorvix, who were behind the machinations and Torchwood Three, where Ng, posing as Gwen Cooper, tried to recruit him for his hacking skills.
Having survived an assassination attempt and a terrorist attack by 3Sol, thanks to the assistance of Ng and sacrifice of Jack Harkness respectively, Tyler was still sceptical regarding Torchwood and decided to continue his investigation on his own. In an attempt to recruit him, Jack began an affair with him.
Tyler managed to find his anonymous source within the Cardiff Council, "Deep Throat", who almost got him killed twice. While confronting this Ms Vorsun, an alien working for 3Sol, Tyler met Jack whose death he had seen just recently. When Ms Vorsun threatened to shoot her human staff in an attempt to get to Jack and Tyler, the latter panicked and told her to shoot away. This decision disqualified him from working for Torchwood in Jack's eyes just as Tyler himself started believing that aliens took over Cardiff.
The Mayor knew about Tyler's connections to Torchwood and from time to time asked him to involve them to sort out Sorvix affairs, diplomatically termed "visitors' protocols" by the city hall. For instance, Tyler brought to Torchwood's attention the hen night of Ro-Jedda's daughter, Madrigal (AUDIO: Aliens & Sex & Chips & Gravy) and the assassination attempt against Vincent Parry, a real estate developer who rented to the Sorvix (AUDIO: Orr).