ALSO how did *poison ivy* get gassed??? (Side note when will harley get her immunity??)

Oh, yeah, she’s supposed to be immune to that, right, except for the Special Formula from s1. Maybe everyone has it now? 

Ok, so, Harley’s immunity, I’ve read that that’s kind of a big deal, right? That in some comic continuity, Harley’s the only one Ivy’s specifically given immunity? Which…nice. But I wondered, on the rooftop in ep 2×12, when the Justice League got dosed, Harley, the closest, wasn’t affected at all. Does that not mean she’s immune?