Lance Sweets, Ph.D., Psy.D., is a fictional character in the American television series Bones. He was portrayed by John Francis Daley.Daley first made three guest appearances as Sweets during the first eight episodes of Season 3, first appearing in "The Secret in the Soil". He was promoted to a series regular and appeared in the opening credits beginning with the episode "The Santa in the Slush". He also guest-starred on the spin-off The Finder.