"The Young and the Restless" this week is filled with suspense and shocking reveals. Was Ian really murdered? Is Dylan really the murderer? And what will Mariah find out about her mother Sharon? Here's what's happening on "Y&R" from Sept. 15 to 19:

Dylan is main suspect

This week picks up right where it left off. Last Friday, Paul was investigating what happened to Ian and why he suddenly disappeared. There was blood found in his place and Paul had a suspect in mind. This week, it is revealed that Paul's main suspect is Dylan and he interrogates him. Paul also discovers that Dylan has a wound on his hand.

Nikki and Maureen

Nikki and Maureen bond when Nick and Sharon make a surprise announcement about their engagement. The new best friends bond over drinks, and Nikki tells Maureen how Maureen is connected to her family. Nikki also shares that she's worried about this connection.

Devon and Hilary

Devon and Hilary have been battling temptations for quite a while now, and they will finally give in to their feelings this week. Neil, still unaware of what's going on, will give Hilary some unexpected news. What could that be?

Victoria is jealous

Billy and Chelsea grow closer by the day and, this week, they will talk about what they have. However, Victoria is on the sidelines feeling jealous of Chelsea and Billy's closeness.

Other spoilers

Michael and Lauren's marriage is rocky and the couple is struggling.  Michael, however, still doesn't want to accept it. Further, Kelly informs Sharon about what's happening to Phyllis.  And Sharon's daughter, Mariah, will discover a "long-buried secret about her mother" this week, reports Soap Central.

Last week, spoilers said that Shemar Moore will return to play Malcolm Winters for a short while. He will be Neil's support during Neil's tough time, which may lean towards Neil finding out that Hilary betrayed him.