This is just a rough guess but 90210 has got about another 12 episodes and Glee hasent hit that many so it will probs be after one of them has finnished unless they show something else first.
Or they could wait to show season 6 again first like atm all eps are being replayed in the morning (theryreon season 4 atm) however they might just show season 5 in the morn, wait and bit then but six on earlier in evenings.
That's all just a rough guess really. Hope I helped though. That's just my thoughts. I kinda rambled. Have you tried watching it on the net?