Their relationship becomes more serious; and, in the episode "The Boneless Bride in the River", Sully asks Brennan to go with him to the Caribbean in his new boat, which he named Temperance, for a year but she refuses.
Parin suhde muuttuu vakavammaksi ja jaksossa "The Boneless Bride In The River" Sully pyytää Brennania mukaansa Karibianmerelle uudelle veneelleen, jolle hän antoi nimen Temperance, Brennan kuitenkin kieltäytyy.