Nachtwacht

Nachtwacht (English: "Night Watch") is a 2015 - present Belgian-Dutch fantasy series about an elf (Celine Verbeeck), a vampire (Louis Thyssen), and a werewolf (Giovanni Kemper) who protect their village and its human residents from supernatural threats. The series costars Sven De Ridder, Luna Van Avermaet, Peter Van De Velde, and Brigitte Heitzer.

Sirene (Season 1, Episode 8)
When a famous singer, Nymphaia, offers to hold a concert in town, nearly everyone attends, including Keelin (Verbeeck) and Wilco (Kemper). Unfortunately for them, Nymphaia is a siren, and she quickly places everyone at the concert into a hypnotic trance. Now under her control, Keelin and Wilco tell her about their secret identities and surrender their magical items. Nymphaia sets her sights on Vlad (Thyssen), who did not attend the concert, in order to get her hand son his ring and gain all of the powers of the Nachtwacht for her own evil purposes. Vlad and Sacha (Van Avermaet) team up to stop the siren before she can transform the town into an underwater portal to the underworld.

Lucifer (Season 3, Episode 4)
A demon possesses constable Cooper (Van De Velde), and uses his hypnotic powers to make innkeeper Helena (Heitzer) agree to marry him. The Nachtwacht try to delay the wedding until after midnight, knowing that Lucifer's powers and abilities will fade at that moment.

Korrigan (Season 3, Episode 10)
A fortune-teller named Korrigan uses her powers to brainwash the townspeople into surrendering seven years of their life force to the demon. After Sacha falls under Korrigan's spell, Keelin disguises herself as the girl and attempts to infiltrate Korrigan's lair, only to be hypnotized herself and turned against her friends.