Nikita is moving back to its old stomping grounds at 8pm on Fridays beginning November 30 and Arrow repeats will air at 9pm according to The Futon Critic. This Friday, Nov. 9, Nikita will still air at 9pm (America's Next Top Model airs at 8pm on Nov. 9 and from 8p-10p for its season finale on Nov. 16). After this Friday, Nikita will take the following two Fridays off before returning on November 30. The Nikita/repeat Arrow pairing will run until at least January 18 excluding Nov. 23, Dec. 14 and Dec. 21 where holiday specials are scheduled.
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Someone at the CW has been trawling ONTD for scheduling tips, obviously.