Jim Parsons surprised the cast of The Big Bang Theory by announcing that season 12 would be his last. The show would not continue without him. The cast, including Melissa Rauch and Johnny Galecki, understood and supported his decision, acknowledging that it would have been difficult to continue without him. Galecki expressed his disappointment at the lack of prior discussion but ultimately accepted the decision. Kaley Cuoco struggled with the news but eventually came to terms with it. The show ended after season 12, which was considered the right choice given Parsons' departure.