that's the way you need it ♪ >> all we can say is it definitely pays to be friends with the boss, chuck lorreth him on "cybill." for kathy bates it was "two and a half men." laurie metcalf worked with him on "roseanne." >> all it takes is a phone call and i come running from wherever i am. >> let me guess, you like "star wars." >> in one episode he meets james earl jones. the two play dingdong ditch on -- >> whose house is this? >> carrie fisher. >> it's not funny anymore, james! >> there have been more than 40 memorable cameos on the show. two of our favors, jerry o'connell as sheldon's brother and joe manganiello who joined the gang for a game of dungeons and dragons. >> i loved you in "magic mike." >> thanks. switch places with me? >> sara gilbert dated johnny in real life and played his girlfriend on "roseanne" so being one of his love interests. >> just her tone of voi puts me into another character. >> i don't know about you. but i'm good until new year's. >> it's been a "big bang" for this cast's bank atk at. >> i'm so grateful. it's been a gift. >> i have been a working actor for 12 y

on stage, she gave creator chuck lorre one last hug outside apartment 4b. >> i don't think there was a dry eye in the house. >>> while "big bang" ends, "90210" is back. >> we're doing a promo shoot for "90210." >> posing for this epic pic last night, the remaining o.g. cast reunited for fox's upcoming reboot. >> we haven't done that for almost 20-some years. >> jennie and ian both posted this prop script with the show's title "bh90210." and check out their action figures at a mini-peach pit. >> why is donna like that? i'm not going to lie, it's weird. >> shannen doherty, who didn't initially sign on to the six-episode series, will now star and ep like the others. a source close to the production tells "e.t.," she had a tough time getting along with the cast in the past but she has put that all behind her. >> just taking us all back to a different time. >> they'll shot mid-may, but missing, of course, luke perry, who died in march. we're told, they all want to ensure luke's memory lives on through the show. the scripted reality series' plot does mirror real life. >> kind of a blend ab

everybody knows it's time but chuck lorre described it as grateful and grief-stricken.tersweet. i keep the wrote from winnie the pooh, how lucky i am to be this sad to say good-bye to something. we all feel grateful. the timing is right. >> it's kind of like a death in a way. it's been a long, long time together. >> somebody described it as being like going from kindergarten to 12th grade with people the whole time, which i thought was a good way. do you agree? >> yes, actually, we did at our show a yearbook, so it went from day one to the last day, and it was literally a yearbook and people on the last day were having their friends sign it and the crew members and it was really kind of a sweet gesture. >> no show has had a rating like this, too. you've been a blockbuster success for such a long period and i love chuck lorre describing when he first brought it to chbs they said no thanks. >> it didn't have this one in it. >> what is the lesson, you're involved in a lot of television. what is the lesson behind that? >> i think initially -- well chuck would say the script

i love how chuck lorre said when they first brought it to cbs, they said no thanks. >> it didn't have lesson, do you think, behind all that? >> i think initially -- chuck would say the script wasn't quite there in that first pilot. >> it was a very different pilot. >> yes, aesthetically it was a different pilot. we didn't have kaley and kunal. whatever that chemistry is, i was there. >> i think of my own kids. we watched the show together with them. do you think of -- they've gone through those 12 years with you. >> it makes you feel quite old, yeah. >>> welcome back to "cbs this morning: saturday." we begin this hour with an incredible discovery on display. just yesterday the largest tee rerks was found. that's not the only distinction. jamie yuccas has the story. >> reporter: scotty roamed the earth some 67 million years ago. this massive beast of the mesozoic area was discovered here in a frenchman river valley in dan. at that time it was a floodplain with lush vegetation. wes long helped reconstruct scotty after spending a decade digging the towering t. rex out of hard sandstone.