This episode wasn't great. It fell into the trap that this show often falls into - they set up some interesting scenarios with a lot of potential, and then failed to deliver. Let's take a look.
Raj gets the honor of working on a proposal for NASA about a message sent out to from Earth to potential aliens. Raj asks the other guys for suggestions. When Howard and Sheldon start bowling him over and making all of these decisions, Raj decides that he and Leonard will work on it alone. Sheldon and Howard are upset about being excluded. Raj and Leonard realize that since neither of them are natural leaders, they can't get anywhere without Sheldon and Howard. They ask them to come back in on the project. However, as they all work together, Raj, Howard, and Leonard slowly realize that Sheldon is the one who always gets his way. In the episode tag, we see aliens receive Sheldon's message and discuss how delicious he looks.
Meanwhile, Penny is torn about her future. She doesn't know if she should go audition for the part in the Kevin Smith movie, or just keep going with her sales career. She goes to Sheldon for advice, who at first insists he won't help her, since he's just learned that he tends to boss people around too much. Eventually, he caves and tells Penny that she should go to the audition and get more information, but there's no reason to make a decision yet. Penny goes to the audition, but she remembers how much she hates the competitive atmosphere, and she decides to stick with her job. She thanks Bernadette for getting her the job, and Bernadette pressures her to take her and Amy out to a thank you dinner.