During the , a new character is introduced: Acting DCI Frank Morgan (Ralph Brown) to temporarily oversee CID after Gene Hunt is wrongly suspected of murder. Tyler is convinced that Morgan is his surgeon, attempting to revive him from his coma. However, Morgan reveals that Tyler is DCI Sam Williams of C-Division at Hyde and a part of M.A.R.S. (Metropolitan Accountability and Reconciliation Strategy), a taskforce to deal with corruption in the police force. He also reveals that "Williams" was sent undercover with a fake identity, DI Sam Tyler, to infiltrate Hunt's team, but developed severe concussion and amnesia after a bad car accident on the way. After finding evidence to substantiate Morgan's claims, a distraught Tyler begins to doubt if he is actually from the future.