Following a tip-off from Perkins' snout, Manson goes undercover as a hitman for a woman who wants her husband killed. As De Costa investigates the domestic violence aspect of the case, the husband's involvement in an actual murder is revealed. Manson is delighted with the result, but De Costa is upset when Manson usurps her CSU authority. Stamp and Best trawl internet chat rooms looking for 'Hotpants', a suspected fraudster who has ripped off a number of "her" on-line admirers. Murphy reveals that Taviner has been to see her. Taviner finds Hollis alone guarding the chapel of rest and Hollis lets slip that Tait was babysitting when Niamh died. Hollis admits to Gold that Taviner started the Sun Hill fire.
