ABC has handed out a sixth-season renewal to action drama series ?Marvel?s Agents of SHIELD." To date, the show averages a soft 1.1 rating among adults in the 18-49 age demo. The renewal comes just ahead of the show's now-season finale on May 18, which had been ominously titled ?The End.? The finale will also reportedly wrap up the program's crossover with Marvel smash hit movie ?Avengers: Infinity War.