Dexter and Debra chemistry
Ok, I know this sounds absolutely unhinged since we're talking about a brother - sister relationship, but I can't be the only one who noticed a strange sort of chemistry behind these two starting with season 1 (way before the whole 'therapist gaslighting Deb to think that she's in love with her literal brother' thing). I don't know if the characters were written with that chemistry in mind or if the chemistry was a result of the actors' marriage behind the scenes, but it's definitely there. I don't even mean chemistry in the traditional "romantic" sense, it's just that every single scene with these two involved felt like a whole vibe. They were like magnets, gravitating around each other. It's like their eyes would brighten up every time they looked at each other. Then, their sibling dynamic being deeply codependent and unhealthy really doesn't help at all, haha.
I actually think their chemistry made the characters feel more real and authentic, but it's still a bit odd, considering the fact that they're siblings. I wonder how much of their synergy involved acting vs actually feeling things without having to act/perform...because in some of their scenes together, it really felt like they weren't acting.