Karen finds a new use for her acting talents as she joins Dev at a high-powered government party. The drama between Michael and Julia heats up, as Eileen and Tom's ambitious assistant Ellis forge an alliance. Ivy senses trouble in her relationship with Derek.

The team deals with the workshop's after-effects; Derek asks Karen to help him steal the show from Tom and Julia; Eileen's daughter's surprise visit forces her to deal with her ex-husband.

When the show's new star gets stuck in Cuba, Derek puts Karen in as understudy; Tom and Julia celebrate their anniversary.

The arrival of a movie star turns ``Bombshell'' upside-down; Ivy and Karen try to overcome their history and unite against their new rival; Tom and Sam's romance heats up.