Rookie Blue is back Thursday, and in tonight's episode, Friday the 13th, the discovery of human bones in the woods revisits an old missing persons case where Sam teams up with his old training officer, Charlie Walsh in effort to help solve the case.

When Sam visits Charlie's house, he gets an up-close-and-personal look at his life which makes him thinks twice on whether or not he wants to follow in his mentor's footsteps.

Sam worked on the case 10 years ago, which included a person named Robbie Roberts who went missing.

Charlie and Sam debate their different ways on how Robbie went missing, when Traci reveals some shocking news about the case considered to be the missing piece.

As Division 15 attempts to finally bring the case to a close, the night gets even more stranger when Chloe and Dov can't agree on how to deal with a witch and her disgruntled client.

Meanwhile, Rookie Blue was recently picked up for a 5th season.

Global Television reported that the cop series is the most watched program in its time slot since it returned for a fourth season and May and holds the No. 1 slot in the U.S.

The show's viewership boosted 15 percent more than its previous summer average. The fourth season is also the most watched season since 2010.

"We're delighted to 'renew the blue' for fans and continue our partnership with ABC on a fifth season, a major feat for Canadian television," Barbara Williams, senior vice-president of content for Shaw Media said.

The fifth season will start production early 2014.

"Rookie Blue" stars Missy Peregrym as Andy McNally, Gregory Smith as Dov Epstein, Charlotte Sullivan as Gail Peck, Enuka Okuma as Traci Nash, Travis Milne as Chris Diaz, Peter Mooney as Nick Collins, Ben Bass as Sam Swarek, Priscilla Faia as Chloe Price and Rachael Ancheril as Marlo Cruz. Also starring in the series is Matt Gordon as Oliver Shaw, and Lyric Bent as Frank Best.

Tonight's episode, Friday the 13th will air 10 p.m.

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Rookie Blue