Isn't it? When Rebecca and then Catherine came to Dallas, it was quite a seismic shift: Cliff was no longer the david against a goliath: he could use the might of the Wentworth empire. And instead of sparring but loving Pam and Cliff, we had snake in the garden Catherine. The show also changed when Bobby decided he had to stop being "by the book" ethical to go against J.R. after Jock died (another change). When I read threads here, so many of these stories are loved by Dallas fans. The thing about these changes is that they were gradual and were believable. Unlike, say, Cliff Barnes turning into Stavro Blofeld with hair in the Cidre cartoon.