Rachel's hiding her dad on set. If only he would stay hidden! When Rachel loses track of him, she finds Asa on set, yelliing at Quinn for mistreating his daughter. It will serve as the final straw to force Rachel to get her dad real help.
You can have 'Take Your Daddy to Work Day' some other time. Madison may be able to screw her way into useful information, but she cannot perform your voodoo. You said you wanted to find Serena love, so go find it for her.