Brooke (Katherine Kelly Lang) and Bill (Don Diamont) are ready to try and say their I do's for the last and final time on The Bold and the Beautiful, but the truth about Ridge's (Thorsten Kaye) helicopter accident is threatening to blow their wedding plans up once more.

Ridge Moves To Stop Brooke & Bill's Wedding?

The couple's previous wedding in Abu Dhabi was interrupted by Ridge, and things took a turn for the dangerous after Brooke's former husband fell out of a helicopter and into the Persian Gulf. Ridge survived the accident, but has a hazy memory-though he remembers seeing Justin (Aaron D. Spears) flying that day, and he knows he saw the Spencer Publications logo on his jacket.

Now, Ridge is busy trying to prove that Bill tried to kill him-and while Katie (Heather Tom) believes him, Brooke is a different story. Katie will try and convince her sister that Bill can be evil, but she too may not have any luck.

Brooke Caught Between Bill & Ridge?

"I just don't know if Bill is the man you think he is," Katie says to her sister in a preview clip for the Thursday, July 24 episode.

Brooke, who ended up with Bill after his and Katie's marriage fell apart, will find herself too deep to realize the man she plans to marry is capable of committing a horrible crime however-and will deny what her sister is trying to tell her.

"Bill is not a killer!" she exclaims in the clip.

Her denials could force Katie to remind Brooke of the shady things Bill has done in the past however-including pretending to end things with Brooke so he could be with Katie again-in an attempt to win back both his position of CEO at Spencer, as well as equal custody to their son, Will-a maneuver that managed to fool both the Logan sisters.

"He is capable of doing anything to get what he wants," Katie reminds Brooke.

"Including murder?" a still-skeptical Brooke replies.

"Maybe," Katie says.

The Bold and the Beautiful airs Monday-Friday at 1:30 p.m. on CBS.

Tags: The Bold and the Beautiful CBS Soap Operas