“Lobster Wars” (9 p.m., Discovery): The hardships of earning a living fishing for

“Lobster Wars” (9 p.m., Discovery): The hardships of earning a living fishing for lobster are chronicled in this new unscripted series that follows a group of lobstermen as they begin another season on the water.

“Mad Men” (10 p.m., AMC): The terrific new drama about the world of high-stakes advertising circa 1960, continues its summer run with an episode that sees Pete’s professional and personal lives becoming more complicated as he tries to assert power in both and further alienates Don in the process.