'The Young and the Restless' spoilers for Oct. 17 – 21: Genoa City deals with an act of revenge, a new rival and the return of a dangerous woman

Terrible things are about to occur in Genoa City on this week’s episodes of “ The Young and The Restless” (“Y&R”). On Monday, Jack (Peter Bergman) uncovers his plot to take down Victor (Eric Braeden), after exacting his revenge on Billy (Jason Thompson). Spoilers suggest that Jack works together with Phyllis (Gina Tognoni) to carry out his plans against Victor.

Sharon (Sharon Case), on the other hand, finds herself falling into old habits with his ex, Nick (Joshua Morrow). However, she’s going to have her hands full as Patty (Stacy Haiduk) comes back to destroy her life. Other “The Young and the Restless” cast members who will appear on the Oct. 17 to 21 episodes include Jill (Jess Walton), Victoria (Amelia Heinle), Abby (Melissa Ordway), Stitch (Sean Carrigan), Hilary (Mishael Morgan), Chloe (Elizabeth Hendrickson), Chelsea (Melissa Claire Egan), Ashley (Eileen Davidson), Paul (Doug Davidson), Kevin (Greg Rikaart) and Mariah (Camryn Grimes).

Spoiler alert! This update contains more "The Young and the Restless" spoilers. Read on at your own risk if you have not watched the latest episode.

CBS released a preview video for the Oct. 17 episode of “The Young and the Restless.” In the trailer, Sharon accidentally drops some boxes and knocks down Nick. She’s surprised to see him naked except for a towel. At that point, Kevin and Mariah open the door and laugh at what they see. Meanwhile, Ashley tells Phyllis, “You can keep working my brother, but I’ll be watching you every step of the way.” Jack wraps the trailer as he warns Billy, “I’m only going to say this one more time. Get the hell out of my office.”

TV Guide reports that Tuesday’s installment focuses on Kevin as he acts as Mariah’s hero. Meanwhile, Paul gets concerned over Patty’s behaviour. Billy, on the other hand, drives Phyllis to the edge.

Wednesday’s run centres on Chelsea as she deals with the pain of remembering Adam. Elsewhere, Chloe incriminates herself while Ashley finds herself having to make a difficult decision.

On Thursday, “Y&R” airs an episode that features Hilary as she crosses the line at GC Buzz. Jack, on the other hand, remains firm with his stand concerning Jabot. Meanwhile, Billy gets into hot water.

Wrapping the week on Oct. 21, Sharon works hard to conceal her secret, while Abby carefully examines her marriage with Stitch. Elsewhere, Victor faces up to a new rival.

Click here to watch some episode previews from the official YouTube channel of “Y&R.” Click here to check out some sneak peek photos of what will happen this week in the CBS soap opera. Find out what happens next on “The Young and the Restless,” which airs weekdays in the US on CBS. In Australia, “Y&R” is shown Mondays to Fridays at 12 p.m. on Foxtel’s Arena.