Josh Cooke is headed to Showtime.

The Better with You star will appear throughout season six of Dexter as Louis Greene, Miami Metro's new lab intern and a friend of Masuka’s. We can only assume he likes dirty jokes.

Other season six guest stars will include: Edward James Olmos, Colin Hanks, Molly Parker, Aimee Garcia and Billy Brown.

They will all have to deal with a Dexter Morgan who is renewed, recharged and refocused.

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