The WB is keeping its Monday and Tuesday lineups intact next fall, but change is in the air on every other night. On Wednesday, Smallville will stay at 8 pm, where it will lead into new sketch comedies Blue Collar TV and The Green Screen. New drama The Mountain (think One Tree Hill on skis) will be paired on Thursdays with the reality-game hybrid Studio 7, and Mark Burnett's Commando Nanny joins the net's Friday comedy lineup. On Sunday, Charmed remains at 8 pm, where it will be sandwiched between an expanded Steve Harvey's Big Time and newcomer Jack and Bobby, the show that's not about the Kennedys.