So, 2 plots
Charlie's: So he is leaving, seemingly to Las Vegas. So it's revealed that he is on a clinicn getting his eyes done. He meets Evelyn. Then he returns, and tries to tell Alan that he got in a fihgti n Vegas, but Evelyn had already told him.
Alan's: With Charlie gone, he grabs his hooker money, his clothes and goes to a bar. There he meets a chick, and tells her he is Charlie. He birngs her home, plays "We Didn't Start The Fire", and goes to bed with her. Turns out she is neonazi who enjoys rough sex. She makes Alan get a Hitler moustache.
Overall: There were some great quotes (like ALan's: One guy had to ruin it for everyone) and good gags (Jake walking in on Alan spanking himself). So a good 9/10.