Why did Hannibal feel the need to regularly visit therapist Dr. Bedelia Du Maurier [Gillian Anderson]?
In the first season, it was his free space. That was the place where he could actually be as open and honest as he can be. The reason he was doing it, I cannot tell you. Hannibal doesn’t gain anything from doing it, but maybe he needs it as well. It was the space where Hannibal could show a different kind of emotion and honesty.
(Thanks to Tina4 for the heads up)