ROBERT PHILPOT Three summer series premiere Tuesday, but even without ’em, it’d be a busy night.Great American Road Trip: As a longtime road-tripper, I’m curious about this new reality-competition series, in which seven families travel Route 66 and visit quirky or iconic landmarks. 7 p.m., KXAS/Channel 510 Things I Hate About You: Ten years after the movie helped make Heath Ledger a star, ABC Family launches a TV-series version starring Lindsey Shaw as the sharp-tongued Kat and Ethan Peck as Patrick, the role played by Ledger.