It's a shame that anything before Season 8 seems to be a rarity to be seen on PBS's main lineup these days. I guess I'm lucky that my PBS station (WFWA Fort Wayne, IN) has a 24/7 kids channel that airs Arthur 7 days a week, in addition to the main M-F PBS schedule. Lately, the kids channel has been playing Seasons 3, 4 and 8. I read in a local TV forum from a station engineer, that each program on the kids channel has a few seasons that they put into rotation... that way, there's not much repetition from the main channel's schedule. I have occasionally seen some classic Season 2 episodes as part of that rotation as well!
Wow, that's lucky. I also have a 24-hour PBS Kids channel that's a subchannel of the main PBS station, but for all shows, it airs the same episodes that air on PBS. I get Arthur four times a day (two on weekends) across three stations since I get two PBS stations, but all airings are the same episodes.
Anyway, next two weeks are...
05/27: "Buster's Book Battle / On the Buster Scale" (16)
05/28: "Follow the Bouncing Ball / Buster Baxter and the Letter From the Sea" (14)
05/29: "Fern and the Case of the Stolen Story / Sue Ellen Vegges Out" (16)
05/30: "Around the World in 11 Minutes / Muffy and the Big Bad Blog" (14)
05/31: "Arthur Unravels / All the Rage" (14)
06/03: "The Curse of the Grebes / Arthur Changes Gears" (10)
06/04: "Castles in the Sky / Tipping the Scales" (9)
06/05: "The A Team / Emily Swallows a Horse" (9)
06/06: "Francine's Big Top Trouble / George Blows His Top" (9)
06/07: "Arthur Weighs In / The Law of the Jungle Gym" (9)
Pretty interesting divide between the two weeks.