S4, E9: A tormented scientist is is killed by radiation poisoning, leading the team to question the victim's collaborator: a famous physicist with an adoring trophy wife.
Austin Pendleton
Marla Sucharetza
Ann Dowd
Aasif Mandvi
Joe Urla
Steve Routman
Anya Migdal
Ellen Lancaster
Rebecca Eichenberger
Pamela Dunlap
Ian Stuart