Alan sits on the couch with his ex-mother-in-law, Lenore (Annie Potts) as she gets very drunk and high off pills. A little inappropriate for a babysitter.
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Lenore, Alan's ex-mother-in-law, is busy sucking his finger. Why? Because she's wasted and hasn't gotten any in 14 years. Still disturbing.
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Chelsea manages to use her powers as a woman to convince Charlie to let Alan's girlfriend, Melissa, move into the house.
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Just when Alan and Charlie think they have their house back, they realized they're whipped by the third generation... Jake and his girlfriend, Celeste.
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Evelyn comes by to do a huge favor and help her sons, Charlie and Alan restore the balance of power in their home. They sold their souls.
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At the request of Alan and Charlie, their mother Evelyn comes by to visit the ladies... and Berta in last night's Two and a Half Men.
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Creepily, Danny the dummy came back in this episode as Alan and Melissa throw a party when Chelsea and Charlie head out.
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Charlie learns from Eddie Van Halen, in a fantastic cameo, that the artist always brings a guitar into the bathroom in case he gets inspired. What's not explained is how his electric guitar produced such an awesome riff without an amp.
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Charlie and his studio friend, played by MadTV alumn Will Sasso, help Mia and her absolutely horrible voice record an album. Hey, anything to get in a woman's pants.
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Out with the old, in the with the new, as Charlie introduces his new fiancee, Chelsea, to his old, Mia.
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Charlie tries to help his ex-fiancee, Mia, start her singing career by lending his piano and musical contacts to her. Don't worry, Chelsea approves.
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Charlie wanders into Judith's room while looking for the drugged up Herb. Of course, Judith makes Charlie be her breathing coach.
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Two and a Half Men Quotes

Charlie: Oh, try MalibuPuddingGirls.com.
Alan: Pudding Girls?
Charlie: Trust me.
Alan: Oh ... ew.

Alan: What's the forecast?
Charlie: High tonight, low tomorrow, 100% chance of hangover.