Rhoda Morgenstern, Lou Grant: [Mary, Lou and Rhoda all walk into Mary's apartment, after abruptly leaving a movie theatre, because, Mr. Grant saw his son-in-law at the film with another woman. Rhoda's the only one who doesn't know why they left, and why Lou's so mad] I'm not angry. What makes you think I'm angry?
Mary Richards: Mr. Grant, do you think you might feel better if you- you know, talk about it, sort of get it off your chest?
Rhoda Morgenstern: Get what off his chest? Please - give me hint, you two. What does it sound like? What letter does it start with?
Lou Grant: [Walks towards Rhoda] It starts with 'I'. I... saw... my... son-in-law at the movies tonight
Rhoda Morgenstern: [Lou's standing almost eyeball-to-eyeball with Rhoda] You saw your son-in-law in the movies tonight?
Lou Grant: Yeah.
Rhoda Morgenstern: Your son-in-law?
Lou Grant: Hmmm
Rhoda Morgenstern: [Realising she understands] Oh.
[Realising the guy they introduced her to was the son-in-law]
Rhoda Morgenstern: Oh!
[Realising the guy was with another woman, who wasn't Lou's daughter, i.e., his wife]
Rhoda Morgenstern: Ooooh!