NBC has announced a premiere date of Jan. 31 for Do No Harm, its new Jekyll-and-Hyde-like medical drama, which will air Thursdays at 10/9c.

Do No Harm will thus launch on the same night as 30 Rock‘s hour-long series finale, which will run from 8 to 9 pm.

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As a result of the new drama — which stars Steven Pasquale (Rescue Me) as a doctor with a very dark side he struggles to keep leashed — copping the Thursday spot, Rock Center With Brian Williams will relocate to Fridays at 10 pm starting Feb. 8, where it will lead out of a 9 o’clock Dateline.

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As a result, NBC’s Grimm — which aired its fall finale on Nov. 16 — will now be on hiatus until March 8.