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First broadcast at 17:00 19 Feb 2014
A face-off between two longtime rivals leaves Dr Sloan and the team skating for clues to a murder.
A serial murderer known as The Casanova Killer is on the loose.
Jesse and Dr Sloan become infected with a disease and are placed in quarantine.
Steve finds himself on an undercover raid in which one of his colleagues is shot.
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Channel 5 Broadcasting Ltd. 2015