“Taxi Brooklyn” is a ride to nowhere. “True Blood’s” final season has been sucked dry of all the good, juicy bits. “The Leftovers” is about as much fun as a root canal with a jackhammer.
Don’t despair. Cinemax electrifies the summer airwaves with “The Knick,” a medical drama from Oscar-winner Stephen Soderbergh (“Traffic”) set in New York City in 1900.