Sara Erikson

When Raj is asked to create a message in case a NASA mission discovers alien life, the guys fight over what he should do. Meanwhile, Penny is torn between auditioning for a movie or keeping her successful pharmaceutical sales job.

When Miley's wish to be Hannah all the time comes true, she finds that, despite a superstar lifestyle, she misses her normal life.

Charlie gets close to Herb's witty sister, as Judith and Herb's wedding nears.

A near-death experience has an adverse effect on Zoey and Walden's relationship; Alan thinks Lyndsey may have a drinking problem.

Luc's mother (Sonia Braga) stirs up trouble when she meddles in Nora's romantic affairs.