"Forever" Season 1 Episode 17 Spoilers - As ABC's immortality-themed drama, "Forever," continues to unravel Dr. Henry Morgan's (Ioan Gruffudd) story, several flashbacks to the key points in his life are seen. And with four more episodes before the finale, Henry's most kept secrets will be revealed.

Prior to tonight's "Forever" Season 1 Episode 17 tilted, "Social Engineering," the episode that aired last week with a title, "Memories of Murder," captivated the viewers with the show's most intricate case. According to TV Fanatic, the victim, who was a young NYU student, looked like she came straight from a movie in the '70s, which got the whole team confused. But they discovered she had been engaging in a fantasy role-play to help an older man relive the memories of his late wife. And the murderer turned out to be her roommate, who had become obsessed with her.

In "Forever" Season 1 Episode 17, immortal medical examiner Henry Morgan and NYPD Detective Jo Martinez (Alana de la Garza) will explore the world of cyber-terrorism to track down a killer after a secret hack-tivist group member turns up dead, Spoilers Guide revealed. But as the investigation is launched, Henry's own secret will be in danger. So, how far will he go to keep his mystery from being revealed?

"Henry and Jo examine the world of cyber-hacking to hunt down a killer, but the investigation jeopardizes exposure of Henry's own secret," "Forever" Season 1 Episode 17 official synopsis reads, TV.com cited. "Henry flashbacks to 1865 London when Nora, now 70, is threatening once again to reveal Henry's condition. Remembering his activist days, Abe (Judd Hirsch) provides Henry with an important clue to solving his current case."

In "Forever" Season Episode 17 promo clip, it is showed that Henry discovers he will be the next target while Jo realizes he's been keeping secrets from her. Meanwhile, last week, Henry seemed to be getting closer in finding a new love after Abigail (Mackenzie Mauzy) left his life. But who will finally capture his heart?

Though Henry has given subtle hints about his identity, there are still some mind-boggling mystery about his life that will definitely be interesting as the season draws to its conclusion. What will happen since Henry's murderous stalker, Adam (Burn Gorman), has been out in the fold?

Meanwhile, Henry must walk a fine line between judging if others' secrets are worth keeping in order to save himself or be ready to take off - again. As the flashbacks revisit Henry's first wife, Nora (Victoria Haynes), it will come with some disastrous consequences.

Catch "Forever" Season 1 Episode 17 as it airs tonight, March 3, at 10 p.m. on ABC.