I remember Ben giving a sweet dose of subliminal brain washing to Carl in some hatch back in Season 2 (was it rather the 3rd season?) . Karl was tied to his chair, shaking and drooling in front of the screen while there was loud drum'n bass playing at the background. Ben later explained that to Alex along the lines of protecting his daughter from getting pregnant.

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"Bear...? Is that you?"-- Hurley S03E4