Supergirl: Parasite Lost Season 4, Ep 5
The villain known as Parasite returns with Jensen as host. Alex adjusts to being under the command of Colonel Haley. Kara and Nia gets an exclusive interview with a prominent alien.
Farscape: Beware of Dog Rewatch Season 2, Ep 14
Chiana buys a parasite-hunting Vorc, which creates chaos on board Moya. After several attacks it is suspected that the Vorc itself may be the parasite.[via]