Smallville (2001)

S3E9 Asylum

After learning that Lionel has ordered electroshock therapy for Lex, three of Clark's past foes seek Lex's assistance to draw Clark to the hospital. Their scheme, however, takes a dark turn when they betray Lex, using kryptonite to siphon Clark's abilities. Meanwhile, in the hospital, Lana encounters an enigmatic stranger whose presence may hold secrets of its own.