Season 4 and Season Finale 

"Aside from Booth, Brennan is most comfortable with her equally brilliant colleagues at the Jeffersonian's Medico-Legal Lab. ANGELA MONTENEGRO (Michaela Conlin), an artist who specializes in reconstructing facial features and crime scenes, is Brennan's earthy and bawdy best friend; "the bug guy," conspiracy theorist DR. JACK HODGINS (TJ Thyne), is an expert on insects, spores and minerals; and DR. CAMILLE "CAM" SAROYAN (Tamara Taylor), the street-smart and centered coroner, must wrangle all the geniuses under her purview. Lending his professional expertise to Brennan and Booth is DR. LANCE SWEETS (John Francis Daley), a brilliant young psychologist who is equally adept at profiling murderers and providing "couples therapy" to Booth and Brennan."

NO ZACH????!!!!!!