The X-Files (1993)

S5E14 The Red and the Black (2)

Following the tragic event at the abduction location where the rebel bounty hunters eliminate everyone, Cassandra Spender vanishes, leaving her son, Jeffrey, a rising FBI agent, to accuse Mulder of her disappearance. Meanwhile, the Syndicate is pressing on with their experiments to develop a vaccine for the Black Cancer, with Marita Covarrubias reluctantly becoming one of their test subjects.