Two And A Half Men: Season 2, Episode 19

2 - 19: A Low, Guttural Tongue-Flapping Noise

After Charlie injures Alan by throwing toast at him, he takes Alan to an eye doctor; they later end up at the coffee shop where they bump into Charlie's ex-girlfriend, Sherri (previously seen in "Bad News from the Clinic"). While there Alan shows an interest in Sherri, and decides to ask her out. The problem is that Alan can't get over Sherri's relationship with Charlie, causing her to angrily break up with him. Title quotation from: The sound that Alan uses to name "the planet" that Sherri is from immediately after he says to Charlie, "She's just like a regular person, except for, you know, being from the planet".[19]