Regan helps out an ex-informer whose son is kidnapped in "Feet of Clay" (Series 4); and his sympathetic pushing enables his boss Haskins to ask for help when his wife goes missing after a breakdown, in "Victims" (Series 4); it's Regan who finds her. Regan can bend the rules in order to achieve the desired result: for example, fabricating evidence and arranging for a criminal to be kidnapped in "Queen's Pawn", and illegally entering private properties and threatening to lie about being attacked by a prisoner in order to get information in "Regan". Despite this, he's unwilling to cheat for personal gain: he delivers a sharp put-down to a corrupt copper in "Bad Apple", and refuses to take a bribe in "Golden Fleece".