TEXT: [ The apartment ] [SCENE_BREAK] Penny: Leonard, what time does your mom's plane get in? Leonard: I don't know, some time tomorrow morning. Penny: Don't you want to know for sure? Leonard: No need to. As soon as she flies into California airspace, I'll feel a disturbance in the Force. Amy: It's so nice both of your moms are coming in to see you guys get an award. Sheldon: Well, my mother's been there for every honour I've won since I beat out my twin sister for the did it on the potty trophy. How does this look? Penny: Aw, it's so nice. She's gonna love it. Amy: Sure, his mom gets roses. When I want them, they're a bouquet of severed plant genitals. Sheldon: You act like I didn't get you that mushroom log on Valentine's Day. Amy: He's right. Roses die, but a moist rotting log will pump out mushrooms for two or three magical years. Penny: You know, your mom's never been too thrilled with our relationship. Maybe I should get her something so she warms up to me. Leonard: If you could run out and get a PhD, that might make her like you. Penny: Really? It didn't work for you. Amy: Do you think the moms will get along? Leonard: Uh, I don't know. They're pretty different. Sheldon: Maybe they'll be best friends. One of them is brilliant, one is sweet and simple. Sound familiar? [SCENE_BREAK] <unk> Our whole universe was in a hot, dense state <unk> <unk> Then nearly 14 billion years ago expansion started... Wait! <unk> <unk> The Earth began to cool <unk> <unk> The autotrophs began to drool, Neanderthals developed tools <unk> <unk> We built the Wall <unk> <unk> We built the pyramids <unk> <unk> Math, Science, History, unraveling the mystery <unk> <unk> That all started with a big bang <unk> <unk> Bang! <unk> Original Air Date on April 30, 2015 [SC
SUMMARY:
Sheldon and Leonard are getting an award for the paper they wrote together and both their mothers are in town for the ceremony. Both mothers focus on Sheldon, making Leonard jealous. He is also irritated when Sheldon claims Penny's engagement ring stone is really a recycled and recut drill bit diamond. Beverly wonders why Leonard and Penny haven't set a wedding date, while Mary is fine with them waiting. The mothers also get into an argument after Beverly describes Mary's religious beliefs as a superstition. Beverly later reflects with Sheldon that perhaps there are other ways than hers to raise children. The mothers make up and Beverly tries to show affection by hugging Leonard, though it is awkward for both of them. Meanwhile, Howard and Bernadette have moved into Mrs. Wolowitz's house with Stuart still living there as well. Bernadette is tired of the other two and Raj lazing around, so she makes them clean the kitchen. Raj points out to Howard that Bernadette acts like his mother. Howard tries to clean the kitchen like an adult but does a poor job. The three men continue cleaning while singing "It's the Hard Knock Life" from the musical Annie.