Casual marijuana use becomes common on TV

Only minutes into this season’s “Mad Men” premiere, Megan Draper giddily pulled out two joints she’d hidden in her bikini, and she and Don proceeded to get high, setting the tone for the season. Reality shows about the cannabis market abound, from “Weed Country” and “Pot Cops” to pot-related material in scripted series such as “The Office,” “Parenthood,” “The Big C,” “Homeland,” and “Hot in Cleveland.”