My Dinner With Mr. Dig is the thirty first episode of Lizzie McGuire's second season.
Lizzie feels uneasy, when her dad becomes best friends with Mr. Dig. Meanwhile, Matt is having a hard time with his mean teacher Miss Chapman.
Lizzie is in a tizzy--she casually mentions to Mr. Dig at lunch one day that he should eat more home-cooked, well-balanced meals, and somehow she ends up inviting him to dinner! She's in a panic at the idea of having to deal with a teacher outside of school, and sure enough the dinner with Mr. Dig starts out disastrously. But the next day at school she tells Gordo and Miranda that the evening actually turned out well. As a matter of fact her father Sam and "Digby" seem to have struck up a friendship. Her mind changes, though, when to her horror, her dad actually shows up at school to exchange CD's with his new buddy!
Meanwhile Matt has his own problems. He, Melina and his classmates are all being terrorized by their teacher Ms. Chapman, who seems to always be in a bad mood as of late. Matt and Melina decide that she needs to get a life outside of the classroom to make her a more relaxed person, so to that end Matt invites her over for dinner at his house one evening.
Lizzie is freaked out by Mr. Dig hanging around their house and bonding with her father, so she tries her best to "break them up," but to no avail. She talks to her mother about the problem. Jo McGuire agrees that the situation is awkward for Lizzie and says she'll talk to her husband about it. But Lizzie then realizes that her father deserves to be able to pick out and enjoy his own friends too, so she determines to put up with Mr. Dig.
When Ms. Chapman arrives at the McGuire home for dinner, she appears to be very stiff and formal, but once she hears that Digby Sellers is going to be there also, she gets very enthusiastic. And once Mr. Dig arrives, some old romantic sparks begin to fly again between the couple. They blow off dinner with the McGuires and leave together, solving Lizzie's problem about Mr. Dig spending too much time at her house.