Eileen Pedde

Thea finds herself in trouble with the police after she gets caught using a drug called "Vertigo." Oliver thinks the only way to keep her out of jail is to find the dealer -- a man who goes by the name of "The Count" (guest star Seth Gabel). Oliver turns to an old flame, and current vice cop, McKenna Hall (guest star Janina Gavankar), for help. Meanwhile, Laurel steps in to defend Thea, and Felicity gives Oliver some disturbing news about Moira.

Mulder questions a former FBI agent (Darren McGavin) about an X-file case from the 1950s which may have involved his father.

Mulder and Scully continue investigating a smuggler while wrestling their way out of a web of intrigue.