Yeah that was more the first season and the first show of the second season but now I am seeing more of mutual respect and a closer friendship but I don't know if they will take it farther. A lot of tv shows use the sexual tension between major characters to keep the audience interested.
I do think Lightman should listen to his daughter (a natural perceptive teen) and not get back with his ex Zoe. He does need a few dates or a girlfriend though. It would make him even sexier.

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