Dynasty - Season 4 - Eps 27: The Nightmare
Alexis suffers recurring nightmares about Mark's death. Kirby again tries to kill Alexis. When she is unable to pull the trigger, Alexis offers to remain silent in exchange for Kirby's agreement to leave Adam. The truth behind the attempt to unhinge Claudia is revealed. Sammy Jo seduced Hess into handling it, and has returned to him now to solicit his help in regaining her child. In preparation for the wedding, Alexis and Krystle visit the same beauty salon. The two women exchange words, and a mud-slinging melee ensues. While dressing for the wedding, Fallon is gripped by a seizure. She drives off as the ceremony is about to take place. The police arrive and arrest Alexis for the murder of Mark Jennings.
About Dynasty

Title: Dynasty
First Air Date: 1981-01-12
Last Air Date: 1989-05-10
Status: Ended
Rating: 6.5/10 (from 115 votes)
Language: EN
Seasons: 10
Total Episodes: 220
Network: ABC
Genres: Soap, Drama
Production Companies: Aaron Spelling Productions
Synopsis
The saga of a wealthy Denver family in the oil business: Blake Carrington, the patriarch; Krystle, his former secretary and wife; his children: Adam, lost in childhood after a kidnapping; Fallon, pampered and spoiled; Steven, openly gay; and Amanda, hidden from him by his ex-wife, the conniving Alexis. Most of the show features the conflict between 2 large corporations, Blake's Denver Carrington and Alexis' ColbyCo.
Cast

John Forsythe
Blake Carrington

Linda Evans
Krystle Carrington

Joan Collins
Alexis Carrington Colby

John James
Jeff Colby

Gordon Thomson
Adam Carrington

Michael Nader
Dex Dexter

Heather Locklear
Sammy Jo Dean Carrington

Emma Samms
Fallon Carrington Colby

Stephanie Beacham
Sable Colby