I did my usual online reading. I watched two first season Glee episodes, "Laryngitis" and "Theatricality," for the Kurt plots. In "Laryngitis," Kurt tries to butch it up to try to get Burt's approval. He tells Sue he's afraid of losing his father because of his "sexuality."
Sue has quite a reply, including: "So you like show tunes. Doesn't mean you're gay. It just means you're awful." Kurt isn't exactly reassured.
This is the episode where Kurt wears flannel and sings Mellencamp, and "dates" Brittany. When he and Brittany are making out, Kurt asks, "What do boys' lips taste like?" Kurt's true self shone through the straight-acting attempts there and in several other places. Burt tells Kurt that Kurt's job is to be himself, and Burt's job is to love him no matter what.
"Theatricality" is the Lady Gaga episode. Finn is surprised to find out that he and Carole are moving in with Burt and Kurt. The boys (except for Kurt) aren't into the Lady Gaga glee club assignment, and do Kiss instead. Finn and Kurt have a blow-out argument in which Finn calls Kurt's room redecorating "faggy" and Burt overhears, comes to Kurt's defense, and kicks Finn out. Finn eventually wears a Lady Gaga dress and sticks up for Kurt against Azimio and Karofsky, who have been bullying them both. The entire glee club bands together for their defense.
"Theatricality" was supposed to be the twenty-first episode of the season, but was switched with "Funk." "Theatricality" makes much more sense when seen as the second-to-last episode of season one. It's an example of Kurt forgiving easily but forgetting nothing. "Graduation," the last episode of season three, was just one of the episodes that showed that Kurt had forgiven a lot and not forgotten anything that happened in the first two seasons and previously in the third season.
Later: I watched "Grilled Cheesus" and "Duets."