Kristin joins the cast in the third season , but was never a formal member of the San Francisco House .
Kristin Adams ( played by Kristin Lehman ) -- A Harvard anthropologist on leave from the Legacy House in Boston .
Kristin Lehman joins the cast in the third season , but was never a formal member of the San Francisco House .
Kristin Adams ( played by Kristin Lehman ) -- A Harvard anthropologist on leave from the Legacy House in Boston .