Fans of The Mentalist looking to get a read on the show’s upcoming fifth season, take note: Rome hellraiser Polly Walker is joining the cast in a major recurring role, TVLine has learned exclusively.

 

The English actress — who scored a Golden Globe nod for her role as Julius Caesar’s manipulative niece on HBO’s period drama — will play Senior FBI agent Alexa Shultz, a gorgeous, fierce and incredibly competent alpha female with a quick-witted personality.

 

Walker’s post-Rome credits include Syfy’s Caprica and Sanctuary. She’s set to make her Mentalist debut in the show’s season premiere on Sunday, Sept. 30.