craig_l.jpgEXCLUSIVE: I’ve just learned from sources that Worldwide Pants’ Late Late Show With Craig Ferguson (the other show owned by David Letterman) is doing a guest-free show tonight. “Since Dave and Craig are the only late night shows that have writers, Craig is devoting the entire show to WGA-produced comedy,” the insider says. “The whole show will consist of all written material, and no guest interviews.” This is Ferguson’s first show back in production since the WGA strike started and the first since Letterman’s company secured its interim agreement from the guild to go back on the air with its writers. This is a big shot in the arm to the writers guild which took the controversial step of allowing some writers to go back to work while others still walk the picket line, a move that has proven somewhat divisive.