Logan's Run - Season 1 Episode 11 Carousel

Logan is shot with a dart that erases his memory by men hiding behind a tree. He then is captured by Francis and another sandman who return him to the City of Domes so that he can go to Carousel and testify before the people that there is no sanctuary. Rem and Jessica are captured by a man from an unamed city who explains that Logan has been placed in transit. transit is a way of neutralizing potential enemies without using violence by a temporary loss of memory. Rem and Jessica must find a way to save Logan from the City of Domes before it is too late.