With Jack Donaghy’s wife Avery in the grips, quite literally, of a North Korean dictator, you’d think he would take some comfort in getting to know her mother. Of course not. This is 30 Rock. In an exclusive clip, Jack and Charlotte Jessup (Mary Steenburgen) make a terrible, barb-trading first impression. Watch Steenburgen go toe-to-toe with Alec Baldwin after the jump.