The Chronicles of Narnia: The Silver Chair (1990)

The Silver Chair was shown on BBC television in 1990. It was the third and final series of The Chronicles of Narnia that ran from 1988 to 1990. This film is based on the fourth novel in the Chronicles on Narnia series.

Plot
In the book, the Witch enchants the main characters by throwing green powder on a fire that produces a "very sweet and drowsy smell." As they breathe this enchanting scent, the Witch plays music and speaks to them soothingly. After resisting for a bit, one by one they are hypnotized and repeat whatever she tells them.

In this scene in the film, the three protagonists - Eustace, Jill, and their "Marshwiggle" friend Puddleglum - find the lost Prince Rillian of Narnia who has been enchanted and imprisoned by a Witch in her underground realm. They free him from his bonds, he returns to his senses, and they prepare to escape together. However, before they can escape, they encounter the Witch. She tries to convince Rillian to stay with her, but he rebuffs her and tells her he is leaving with his true friends.

Before they can leave, the Witch throws magical green powder on a fire pit, which fills the room with a sweet, enchanting smell. This smell makes everyone sleepy and suggestible, especially Eustace and Jill who seem more susceptible to it. As her victims breathe the hypnotic scent, the Witch tries to convince them that her underground realm is the only reality, and that everything else is just a dream. She speaks soothingly with each of them, looking in their eyes and tossing puffs of her green powder in their faces in her efforts to hypnotize them.

She begins working her enchantments on Rillian, but Puddleglum interrupts and tries to argue with her. He manages to resist her even as she tosses green powder in the air around him to enchant him. Eustace tries to argue with her too, but he is more susceptible to her hypnosis. He starts looking dazed and sleepy when she tells him that Narnia is just a dream. The Witch leaves Eustace in a trance and starts enchanting Rillian again. Then Jill interrupts and confronts the Witch. The Witch easily hypnotizes Jill by looking in her eyes and making her smell more of the enchanting green powder. Jill starts repeating everything the Witch says. The Witch then tosses a puff of green powder in Eustace's face, and he is completeyl hypnotized too. Jill and Eustace are agree with the Witch that their world is "all a dream" and "there never was any world but yours." They look like they are falling asleep. Rillian just watches silently, apparently hypnotized too. Puddleglum still refuses to give in and makes a speech about remembering Narnia. This makes the Witch angry, and she knocks Puddleglum unconscious. This commotion wakes Jill, Eustace, and Rillian from the Witch's spell.

Rillian tries again to argue with the Witch to no avail. He closes his eyes and goes silent, and the Witch turns her attention back to Jill and Eustace. She hypnotizes them again again with her green powder, and they repeat everything she tells them. Jill manages to snap out of it for a moment, but the Witch easily hypnotizes her again. She tells them to forget their world and Narnia as dreams and stay in her world. She sprays them with her green powder and tells them to go to sleep. Completely overcome, they close their eyes and start nodding off. Puddleglum comes to and sees what is happening. Before Jill and Eustace fall asleep, Puddleglum stomps out the magical fire to eliminate the enchanting smell. The spell is broken, and Jill and Eustace wake up from their trance for good this time, angering the Witch.