Smallville 10×07 AMBUSH Episode Description
AMBUSH — The General (guest star Michael Ironside) and Lucy Lane (Peyton List) decide to drop in on Lois (Erica Durance) and Clark (Tom Welling) for a surprise Thanksgiving dinner. Clark and the General get off to a rocky start after Lois’ father bashes the superheroes and tells Clark he is trying to pass a vigilante registration law. Meanwhile, in an effort to stop the vigilante registration act from being passed, Rick Flag (guest star Ted Whittall) lies to Lucy in order to lure Clark away from the farm long enough for him to assassinate the General. Lois is torn between making her father proud and her love for Clark. written by Don Whitehead & Holly Henderson
Source – CW.