TVLine Items: Isles Star Is Shameless, TWD's Mystery Newbie and More

Rizzoli & Isles star Sasha Alexander is taking a break from crime and becoming a little Shameless.

The actress has landed a multi-episode guest arc on Season 5 of the Showtime drama. She’ll play Helene, one of Lip’s college professors, EW.com reports.

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The character is described as confident and erudite with a wild side. Bets on how long it is before teacher and student hook up?

Ready for more of today’s newsy nuggets? Well…

* Tyler James Williams (Go On, Everybody Hates Chris) will appear on The Walking Dead as a mysterious new character named Noah, per The Hollywood Reporter. Hit the comments with your theories!

* TNT has given a pilot order to the fantasy drama Lumen, produced by Steven Spielberg’s Amblin Television and directed by Joe Johnston (Captain America: The First Avenger), our sister site Deadline reports. The project — penned by Chris Black (Mad Men) — is about a family locked in an alternate world.

* Saturday Night Live vet Molly Shannon will visit CBS’ The Millers, playing a longtime nemesis of Margo Martindale’s Carol, EW.com reports.