S1·E4 Dark Vengeance

Seattle's darkest criminals are forcing Elijah Kane and his hard knuckled team to work around the clock tracking down a meticulous 'Black Magic'- practicing killer, in the vagrant strip club underworld. With the killer using very specific and occult techniques, Kane seeks help, which arrives in the form of criminologist and guest star, Tanaka, who warns Sarah Montgomery of the dangers that the case could lead to. With a rough and tough new attitude Sarah's acquired from her teammate, Juliet Saunders, she volunteers to work undercover, dancing in a strip joint known to be crawling with the sleazy and the dangerous.