Cathrine Grace

Meredith and Lexie's father returns to Seattle Grace with stomach pains and a new girlfriend; Alex butts heads with the new OB; Mark bribes Jackson for information on Lexie.

Reese tinkers with Malcolm and Stevie's science experiment; while selling candy for school, Dewey fibs that the money will be used to support the war on terrorism.

Preston and Porter move out; Gaby and Carlos visit her hometown; Keith asks Bree to move with him to Florida; Susan uses her ailment to get special treatment; Paul makes a decision about Beth.

The team investigates when a woman disappears during a magic trick, while Nick probes the apparent overdose of a popular singer.