On the episode "Take It," Dexter attends a Jordan Chase-hosted seminar. Quinn, meanwhile, realizes that he may have made a mistake in hiring someone to investigate Dexter.
Added:
Dexter answers a call from Lumen in this clip from "Take It." The former is spending time at a Jordan Chase self-help seminar.
Added:

Dexter Season 5 Episode 8 Quotes

Dad once told me that some people deserve to die.

Dexter

I've never been around so many people who made me feel normal. [Pause] Really normal.

Dexter