We haven't even seen the season three finale of Suits yet and USA Network has already announced the addition of two new cast mates as recurring guest stars, DB Woodside and Brendan Hines, for the show's fourth season. With the season finale airing April 10 at 9/8c on USA, production for season four begins just a few days from now, April 7, in Toronto, ON and Suits will return to our TV screens this summer.