In the third season, Tara's characters return after many months of calmness that everyone has. Back then, it seems that Buck is definitely looking for her brother Price during that time. Over time, Tara decided to return to college and gain more confidence to adopt the degree, which worries Max a little.
It's all laying the groundwork for a gripping, almost nightmarish second half of the season in which the life of every member of the Gregson family seems in danger of splintering as badly as Tara's psyche.