When Patrick Duffy was asked to return to the show in 1986, his wife told him that the only way it could happen is if his character had actually died in a dream. This led the producers to decide that Bobby Ewing's death (in addition to the entire 1985-86 season) was just a figment of Pam Ewing's imagination.
Originally aired as a 2-hour episode together with part 2.
When Victoria Principal opens the shower door in the infamous Bobby shower scene, actor John Beck was the one in the shower. The shock to Pam was supposed to be that he had been killed. The shot of 'Patrick Duffy' was inserted later. Actually Pam would not have been shocked to see Mark (John Beck) in the shower considering that his character had been brought back during the "dream season" and she had married him earlier in the very same show.
This season was shot on video tape instead of film - the video and audio quality is worse than prior seasons, which is very evident when watching on DVD.