As part of the run-up to the series finale of Alias, seasons four and five of the show are now available on iTunes. You can buy one episode for the usual $1.99 or you can buy all of season four for $34.99. And, for the rest of the season, new episodes will be available the morning after they air.

Alias returns tonight for a two-hour episode from 8 pm to 10:01 pm (thus, no Lost).