Mandy's New Baby Isn't The First To Crash A TBBT Character's Big Day

In "The Big Bang Theory" Season 10, Episode 11, titled "The Birthday Synchronicity," Amy is noticeably excited and giddy for her annual birthday ritual with Sheldon (Jim Parsons). With the contractual blessing of Sheldon's relationship agreement, the two are physically intimate with each other once a year as an unforgettable birthday gift to Amy. This year, she puts a fun twist on it with a secret trip to The Wizarding World of Harry Potter and some sexy souvenirs. 

Unfortunately, Amy's dreams are squashed by Bernadette's (Melissa Rauch) premature labor scare, which gets the whole group of friends up and out to the hospital. This sentimental and touching moment is quickly deflated when Bernadette is sent home early for not being ready to deliver yet. This frustrates Amy even more as she tries to salvage what's left of her birthday night with Sheldon. It's wash, rinse, repeat from here until Bernadette finally has baby Halley, with Amy getting more annoyed every time.

This parallels Sheldon's situation at the hospital with Mandy with him being stuck between a rock and a hard place. He can't find a ride to his database launch and he can't use his big brain to make the baby come faster, putting a sharp pin in his pressing plans.