Get Excited for the Jon Hamm-Hosted Halloween Episode of Saturday Night Live 5.13K Whitney Jefferson 10/28/10 11:03AM Filed to: Saturday Night Live Saturday Night Live Jon Hamm Kenan Thompson Video TV This Saturday will mark Jon Hamm's third time hosting SNL in under three years. If the fact that the cast loves the guy isn't enough to get you pumped, watch he and Kenan Thompson goof around in the promos inside![There was a video here]