‘The Bold And The Beautiful’ spoilers for Sept. 21: The Forresters put a united front to change Eric’s mind; Quinn and Steffy face off again

Family drama escalates to the highest level on the upcoming episode of “The Bold and Beautiful” (“B&B”). On Wednesday, Ridge (Thorsten Kaye) takes the lead in confronting Eric (John McCook) and convinces him not to push through with marrying Quinn (Rena Sofer). Spoilers suggest that they will appeal to the Forrester family’s patriarch’s emotions.

Meanwhile, Quinn has another heated argument with Steffy (Jacqueline MacInnes Wood), who is determined to stop Eric’s wedding. Other “The Bold and the Beautiful” cast members who will appear on the Sept. 21 installment include Brooke (Katherine Kelly Lang), Bill (Don Diamont), Thomas (Pierson Fode), Rick (Jacob Young), Wyatt (Darin Brooks), Liam (Scott Clifton) and RJ (Anthony Turpel).

Spoiler Alert! This article contains "The Bold and the Beautiful" spoilers. Read only if you want to know more about it.

TV Guide reports that on Wednesday’s episode of “B&B,” Quinn tries to persuade her son to support her happiness. Meanwhile, Ridge leads the Forrester family in contesting Eric’s latest decision. They also grill the patriarch about his latest bombshell.

The show’s official YouTube channel posted a preview video for the Sept. 21 episode. It features multiple scenes with Ridge, Eric, Quinn, Steffy and Wyatt.

Ridge opens the clip as he spearheads the family’s plea to Eric. “We all love you and we care about you,” he says. “We can’t let you marry Quinn.” He adds that Quinn is never going to be a part of their family.

In another part of the video, Quinn tells Steffy that Eric loves her. Steffy replies, “And I love my grandfather.” Later, Quinn begs Wyatt to attend her wedding with Eric. “You’re my son,” she states. “It’s my wedding day. I want you to be there.”

"The Bold and the Beautiful" recap

On Tuesday, Bill begged Brooke not to let RJ run her life. He urged her, “Let’s do this,” pertaining to their wedding. Brooke said her first priority is her son. Bill agreed to wait, but not for long. Steffy and Thomas are shocked after finding out that Brooke hasn’t left to marry Bill. Steffy said there’s a lot riding on this – the future of the company and the family is at stake.

Meanwhile, Eric and Quinn started planning the wedding, preparing to email invitations. Eric assured her that she’ll be Mrs. Eric Forrester and there’s nothing Ridge, or anyone else, can do to prevent it. They discussed his family again and Eric continued to guarantee Quinn the Forresters will come around. They kissed and sent the invitations. Ridge was stunned when he receives Eric and Quinn’s wedding invitation, scheduled in two days.

Click here to watch some episode previews from the official YouTube channel of “B&B.” Find out what happens next on “The Bold and the Beautiful,” which airs in the US from Monday to Friday on CBS. It also airs on Channel Ten in Australia.