Encore Wednesday, Dec. 22, 2021 at 9 p.m. and Thursday, Dec. 23 at 5 a.m. on KPBS Kids / On Demand. Joan Rivers lends her voice as Francine's sharp-tongued grandma, Bubba, in an episode about family traditions and communal celebration. Francine's convinced that she can fast on Yom Kippur. Then, Arthur comes to the rescue and proves that giving gifts isn't the only way of showing you care.