Lance Sweets (John Francis Daley), or simply "Sweets", as he is called on the hit Fox television show "Bones, " is a young psychologist assigned to FBI Agent Booth (David Boreanaz) and Dr. Temperance Brennan (Emily Deschanel). Sweets begins counseling them after the FBI decides that their working relationship is problematic. The main problem is that Booth arrested Brennan's father, who was an escaped convicted.
Brennan, who has more than a slight dislike for psychologists, does not like Sweets at first. Booth's dislike for Sweets is based simply on his young age. Sweets is a 22-year-old who could pass for a teenager. The fact that he has two doctorates means nothing in Booth's eyes.
Throughout the course of the series, Booth and Sweets begin to get along quite well. They develop a father-son type of relationship. This is touching because the episode "Mayhem on a Cross", reveals some of Sweets' childhood history and trauma. Booth, Brennan, and Sweets bond over their shared childhood abuse when Sweets lifts his shirt to reveal scars from a whip.
In the beginning of the series, Sweets was certain that everyone at the Jeffersonian hated him, but in the episode "The Cinderella in the Cardboard, " he found out through Cam that he was wrong. All in all, he is a very likeable character. Many of Jeffersonian team members elicit advice from him, and even Brennan begins to admit to his usefulness.
"You have an irrational prejudice against psychology. Probably because of some emotions so complicated for you to deal with."
"Hey, I will be singing "Lime in the Coconut" after you, and you will be extremely impressed... as was my abnormal psychology class in college."