Dallas premieres this Wednesday on Channel 5 and the cast say the new series is like the "last but on steroids" as "it's everything and more".
Larry Hagman advised fans " to pay attention otherwise you'll miss out" as producers have packed "three episodes into one".
For the new Dallas, Josh Henderson, Jesse Metcalfe, Jordana Brewster and Julie Gonzalo have joined the cast.
The younger actors have revealed the new series features them having sex a lot.
Jordana Brewster also admitted that Dallas watchers can expect a great deal of "relationship drama and many twists and turns".