- Patricia Arquette (Allison Dubois)
- Jake Weber (Joe Dubois)
- Miguel Sandoval (Manuel Devalos)
- David Cubitt (Lee Scanlon)
- Sofia Vassilieva (Ariel Dubois)
- Feodor Lark (Bridgette Dubois)
Medium — S5E7
Episode: A Necessary Evil
Air Date: 2009-03-23
Runtime: 44 min
Overview
Allison is visited once again by the ghost of Agent Cooper, who tries to help her figure out who the real murderer is in a confusing case. Allison begins to question Agent Cooper's motives though and is unsure whether or not she should heed his advice.