"Slack Tide" is the seventh episode of the fourth season of the Showtime television series Dexter. Dexter finds himself enjoying a brief moment of tranquility. He's finally managed to strike a balance between work, family... and other pursuits. But he's keenly aware that times like these aren't meant to last. When Miami Metro discovers a string of murders connected to a prominent photographer, Dexter sees an opportunity for a clean kill. However, his plans seem to be thwarted every step of the way. Quinn has taken a renewed interest in Dexter's nightlife. Dexter's plans to keep Astor and Cody distracted with new activities soon backfire. Even Harry disapproves of Dexter's choice of pastime, urging him instead to focus his efforts on the Trinity Killer. Meanwhile, Debra returns to work, frustrated to find everyone treating her with kid gloves. She decides to concentrate on her pursuit of the Trinity Killer as well as delving into her father's checkered past - investigations which Dexter fears might lead her to danger - or worse, the truth.
Hank's attempts to set things right with Karen lead to even deeper entanglements with the campus ladies. In the meantime, Charlie tries to prevent Sue's top client from leaving the agency and Becca scolds Hank for being a terrible role model for her.
Susan believes that Katherine may be Julie's assailant. Angie invites reluctant Bree and Orson to dinner. Gaby struggles to home school Juanita. Lynette has her own suspicions about who attacked Julie. Angie confronts Nick.
When Brian begins dating an older woman, the family begins to make fun of him. After Brian's new fling breaks her hip, he gets the pleasure of becoming her errand boy.
After attending to the concert of a teen superstar, Stewie discovers a surprising secret about the singer. Meanwhile back at home, Chris tries to prove the existence of the Evil Monkey.
Lisa becomes very attached to an -year-old boy who she witnesses being crushed by a ride at a fair. Meanwhile, Andy and David try to get a VAD ventricular assist device for one of their patients.
An investigation into a deadly case of mistaken identity reveals a secret love triangle and an underworld web of intrigue.
The 1986 murder of a jockey is investigated after his body is discovered in a mass grave for horses. The victim disappeared shortly after losing a race that he had planned to be his finale before retiring.
Don has a big meeting with Connie about their future relationship. Betty is the beneficiary of some interesting advice and Pete has a serious sit-down with some clients.
Sonny gives Nico and Grady a gift for their birthday but they start to fight over it. They then decide that they will no longer be friends and start hanging out with Sonny. Sonny gets annoyed and tries to find a way to make Nico and Grady friends again.
Kitty is devastated when she must face the aftereffects of her cancer treatment. Meanwhile, Nora makes an unexpected friend; and Scotty's father shares some shocking news about his marriage.
The lives of the kids at Degrassi Community School dealing with the serious and sometimes taboo issues that plague teenagers.
Holly J. has fallen hard for Declan but will school politics and parental pressure split them up? Meanwhile, Connor valiantly continues his quest to fit in.
Believing Ofdensen is dead, Dethklok is forced to become their own managers while dealing with repairs to the destroyed Mordhaus and trying to plan their biggest concert to date. Their efforts are stalled however when a past acquaintance cuts off their unlimited financial freedom to get revenge against the band.
Cleveland is embarrassed when Cleveland Jr. publicly announces that he will remain a virgin. But when he discovers how embarrassed Cleveland is, he vows to lose it.
Larry is forced to embrace his feminine side Cheryl competes for a Seinfeld role a law officer has an unusual name.
Dr Martin Ellingham and Pauline are surprised by the number of patients coming to see him on the last day before his Surgery closes and he moves to London.
Adventures of a teenage pop star who keeps her identity secret from even her closest friends by using a disguise on-stage.