- as Walter Skinner
- as Fox Mulder
- as Dana Scully
- as Erika Price
- as Monica Reyes
- as Agent Einstein
- as Agent Miller
- as Jeffrey Spender
- as Dr. Joyet
- as Mr. Y
- as Cigarette Smoking Man
- as Young CSM
- as Young Cassandra
- as Himself (Archive footage)
- as Himself (Archive footage)
- as Himself (Archive footage)
- as Herself (Archive footage)
- as The Driver
- as Himself (Archive footage)
- as Himself (Archive footage)
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