Halfway through the pilot of “Astrid and Lilly Save the World,” best friends Astrid (Jana Morrison) and Lilly (Samanatha Aucoin) stare down a mysterious stranger (Oliver Renaud) with awe and suspicion. “I’m your guide,” he insists. When they continue to just blink back at him, he sighs and clarifies that he’s their “Giles,” knowing that, […]