Summer Glau

It’s not a back nine pickup, but as far as welcome Chuck news goes I’ll happily take it: Summer Glau has signed on to guest star as the show’s newest Greta!

The Sarah Connor Chronicles siren and EW Sexiest Beast finalist has been tapped to play the Buy More’s rotating undercover agent in this season’s eighth episode, sources confirm to me exclusively.

Other upcoming Gretas include Stacy Keibler and Isaiah Mustafa. Olivia Munn originated the role in Monday’s season premiere (and was hilarious).

Glau will next appear opposite David Lyons in NBC’s midseason drama The Cape.