Alex O'Loughlin, Scott Caan
Steve McGarrett (Alex O’Loughlin) and Danny Williams (Scott Caan) will put their lives in danger as they search for a missing uranium that was used as a bomb in “Hawaii Five-0” Season 7, episode 18. Pictured: “Hawaii Five-0” co-stars O'Loughlin and Caan answer questions during the CBS, Showtime and the CW Television Critics Association press tour in Beverly Hills on July 28, 2010. Reuters/Lucy Nicholson

Love was definitely in the air for Steve McGarrett (Alex O’Loughlin) and Danny Williams (Scott Caan) as they celebrated Valentine’s Day with their respective girlfriends, Lynn (Sarah Carter) and Melissa (Lili Simmons), in the previous episode of “Hawaii Five-0” Season 7. But in the show’s upcoming episode 17, the team will be entangled with a serial killer’s mind games and the potential comeback of Dr. Madison Gray (Elisabeth Rohm).

Things seem to get messier in “Hawaii Five-0” Season 7, episode 17, titled “Hahai I na pilikua nui,” or “Hunting Monsters.” Based on the episode’s synopsis on TV Guide, McGarrett and the team will be getting involved in the twisted mind games of notorious serial killer, Dr. Gray.

Team Five-0 will definitely be taken by surprise when Gray stumbles into the Honolulu Police Department covered in blood. What’s more baffling and interesting in “Hawaii Five-0” Season 7, episode 17, however, is the fact that the blood matches Alicia Brown’s (Claire Forlani), not to mention Gray’s claims of having an amnesia.

With that said, the main priority for McGarrett and the team will be finding out if Alicia is still okay and what will happen next since Dr. Gray has made an unexpected comeback. Meanwhile, as the characters struggle with a new case, CarterMatt noted the addition of recurring cast in the show has added some twists into the series’ case-of-the-week format.

Prior to “Hawaii Five-0” Season 7, episode 17, the previous episode tackled the Valentine’s Day event in the department. But as McGarrett and Williams attempted to take a romantic holiday with their special someone, Lynn and Melissa, the rest of the team was left to solve a murder case involving a man identified as Jeremy Holder, who was found dead in a dumpster after meeting a couple at the Vortex dance club, TV Fanatic reported.

So, what do you think will happen in “Hawaii Five-0” Season 7, episode 17 as Dr. Madison Gray reappears in the upcoming season with profiler Allison Brown? Don’t forget to catch the upcoming episode on Friday, Feb. 17 at 9 p.m. EST on CBS.