Penny (Kaley Cuoco-Sweeting) is at an impasse on the next episode of CBS's The Big Bang Theory as she must decide what she wants to do in her career.

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CBS has released a plot synopsis for the next episode of The Big Bang Theory, which is titled The Communication Deterioration. In this episode, Penny will be thinking about returning to acting again.

"Penny is torn between auditioning for a movie or keeping her successful pharmaceutical sales job," the plot synopsis reads.

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Meanwhile, Raj (Kunal Nayyar) will have a very important responsibility involving NASA, so naturally Sheldon (Jim Parsons), Leonard (Johnny Galecki) and Howard (Simon Helberg) will get involved.

"When Raj is asked to create a message in case a NASA mission discovers alien life, the guys fight over what he should do," the synopsis reads.

This is the 21st episode of the series and will air on Thursday, April 16 in the sitcom's regular 8 p.m. ET/PT timeslot.

In other Big Bang Theory news, the sitcom has surprisingly decreased over the course of the season in ratings. Debuting with a 5.4 in the 18-49 demographic and 18.08 million viewers for the season 8 premiere, the show has taken a bit of a tumble in viewership.

Thursday night's episode of the sitcom scored a 3.4 in the demo and 14.64 million viewers. It remains to be seen if the show will rise again as the finale approaches or if it will continue slipping.

The Big Bang Theory airs Thursdays at 8 p.m. ET/PT on CBS.

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