Here's our second Brothers & Sisters casting scoop of the day:

John Glover, best known to to fans of The CW as Lex Luthor's morally ambiguous father on Smallville, is joining the cast of the show.

According to Michael Ausiello, the actor will play a love interest for Ron Rifkin's recently outed Saul. Glover's deal is for a minimum of three episodes. No word yet on when he debuts.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.