Dr. Lance Sweets (Season 3–) is an F.B.I. psychologist assigned to Booth and Brennan after Booth arrests Brennan's father and, later, her brother. The character made his first appearance in Season 3, Episode 4, "The Secret in the Soil", and became a main cast member in Episode 9, "The Santa in the Slush".
When he joins the cast, he is 22 years old, which is remarkable for a Ph.D. achiever; but he looks much younger, which causes Booth to be rude and condescending. While he is annoyed at Booth, Sweets stands his ground, even coaxing Booth and Brennan into going on a double date with him and his tropical fish-specialist girlfriend, April. Sweets and April break up shortly after the date, and Booth and Brennan become something of a "crying shoulder" in a reciprocal relationship.
He later falls in love with lab assistant Daisy Wick. Also, Sweets is trained as a profiler and has assisted Booth and Brennan, finding even dull lab–work new and exciting.
As part of Season 3's storyline concerning the serial killers collectively known as The Gormogon, Sweets helps Booth and Brennan identify possible victims and profile the Gormogon. He can talk effectively with Booth and Brennan in the language appropriate to each; but he has an unfortunate tendency to use language similar to valleyspeak when testifying in court, which is inappropriate for someone of his age and accomplishments.
He is also a big part in the matchmaking for Brennan and Booth and writes a book about them, which he discards when he learns from them that it was based on a false premise. He makes a guest appearance on the second episode of The Finder to assess Walter Sherman.
In the episode, "The Bones on the Blue Line", Sweets, after a near-death experience, proposes to Daisy, who accepts. However, in the Season 5 finale, "The Beginning in the End", Daisy decides to leave on a year-long anthropological dig with Dr. Brennan, and Sweets says that he would not wait for her.
Upon the reassembly of the team in the Season 6 premiere, his relationship with Daisy is unclear since he adamantly rejects her request to return to their engaged status. However, at the end of the episode, They reconcile, having been unable to keep their hands off of each other.
In the Season 8 episode "The Tiger in the Tale", Sweets and Daisy rent an apartment together, and both, especially Daisy, seem excited at the chance to live together. Later, though, Sweets starts to have doubts about moving in with her, especially after learning from Angela and Booth that, while he may not see moving in with Daisy to be a big deal, she likely does.
After Daisy states that she believes living together will eventually lead to marriage, especially if she gets pregnant, Sweets realizes that he and Daisy want different things out of their relationship (since he is not sure that he wants them to get married), and breaks up with her. Sweets gives her the key to the apartment, allowing her to live there herself, while, after spending two weeks living in his office, he moves in with Brennan and Booth because Booth feels bad for him.
Occupation: Psychologist at the FBI
Physical Description Gender: Male Hair Colour: Dark Brown Eye Colour: Brown