This story is part of “The Hills Are Alive,” a tribute to King of the Hill that appears in Texas Monthly’s August issue. Read why the animated series is the most significant work of Texan culture in thirty years, learn what’s new in Arlen, and catch up on essential episodes before you start the new season. Stepping off the Jetway into the Dallas Fort Worth International Airport, Hank Hill drops to kiss its semi-hallowed ground. “Texas,” he murmurs ecstatically. This uncharacteristically emotional, decidedly unsanitary gesture appears in the early moments of King of the Hill’s first new episode in fifteen years. The arrival marks a triumphant homecoming for Hank, cartoon patriarch and propane salesman, who is heading back to Arlen with his wife, Peggy, after…