Is this from the season 1+2 Dallas dvd set?
I don't have the season 1+2 set. I started watching the original Dallas starting with the season 3 dvd set, with the "Who Shot JR?" cliffhanger at the end of the season.
(I ended up returning my season 1+2 dvd set for a refund, due to one of the discs being defective. It turned out episodes 7, 8, and 9 were missing entirely, and episodes 4, 5, and 6 were duplicated two times in this particular defective dvd set. A grave manufacturing defect).
Yes, those episodes all aired in early 1978 and during the 1978-79 season. IMO the show didn't really take off until Mary Crosby replaced Colleen Camp as Kristen. She was one of my favorite characters in all 14 seasons.