As NBC's "Law & Order: Special Victims Unit
" embarks on its 13th season, Christopher Meloni is out, Mariska Hargitay is still in, and two new actors
-- Kelli Giddish and Danny Pino -- have joined the cast. Like its previous seasons, "SVU" will be welcoming a number of guest stars to portray lawyers, cops, perps, and victims. Click through this slideshow to see which actors will be stopping by this season. Make sure to check back often as more guest stars are announced.