Click to see Spoiler:
Instead of having a "big bad" character like Trinity whose plotline
runes through the whole season, it'll be his therapist's plotline (what
he will and won't reveal, etc,). Another case of someone seeing
behind the mask:
*Season one: Ice Truck killer/brother
*Season two: Lila
*Season three: Jimmy Smits
*Season four: Trinity

Maybe season five will be his post-Rita murdered therapist.