Hawaii Five-0's Steve McGarrett and Danny Williams are a therapist's nightmare.

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The former Navy SEAL and his detective partner will be back in couples therapy at the start of "Kuka'awale (Stakeout)," and neither of them will be particularly pleased to be there.

 A dysfunctional duo, McGarrett (Alex O'Loughlin) and Danny (Scott Caan) often fail to see eye to eye, a problem that Steve believes stems from Danny's overly sensitive nature and Danny blames on his coworker's control issues (see video here).

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Unfortunately for the pair, their frequent jabs at each other in the therapist's office won't help her opinion of their partnership and their mediator will dish out homework and another required session when the meeting comes to a close.

With the "Perfect Partners" workbook in hand, McDanno will have to take the packets unwanted advice and utilize it while cohabitating in annoyingly close quarters for a stakeout. Five-0 will take up residence across from a diamond thief's apartment during "Kuka'awale (Stakeout)," and McGarrett and Danny will find themselves cooped up in an old woman's apartment while they await the criminal's return.

Find out how the stakeout plays out when Hawaii Five-0 airs Friday at 9 p.m. ET on CBS. Click the video below to see a preview for "Kuka'awale (Stakeout)."