When homeless persons begin going missing mysteriously from the streets in Kansas City, a local detective calls the BAU to investigate the disappearances.
Ken attempts to give Allison the proposal she never had. Meanwhile Molly enlists Dave's help to reconstruct Ken's prized model skeleton. At work, Julie accidentally drugs Pat.
Nikki's recently widowed nana (guest star Isabel Sanford) tries to hook up with professor Oglevee (Dorien Wilson). J. Anthony Brown guest stars.