<P> Anne Dudek portrays a teacher named Danielle McCaskin, who falls madly in love with her student, Keith Tyler (Anton Yelchin), after regrettably having sex with his father in the episode "Tru Love ." </P> <P> In "Siren Call," Brooke Shields portrays Kelly Sloane - Raines, a rich supermodel whose husband is believed to be involved in the murder of a small - town police officer's daughter . </P> <P> Rip Torn guest stars as Jules Copeland in "Bedfellows," the wealthy and snide father of a wealthy and prominent historian . </P> <P> Liza Minnelli guest stars as Beth Harner, a grieving mother who might get closure as a suspect is found that might have been involved in her daughter's brutal murder on Halloween night in the 1990s . The episode "Masquerade" revealed many resemblances to the case of JonBenét Ramsey, a six - year - old girl made famous by her unsolved murder and subsequent media coverage . </P>

Law & order criminal intent season 6 episode 21