User blog comment:122438/Question about Nickelodeon/@comment-2128395-20100908041031

The way I see it; they thought iSam's Mom would gather more viewers. Especially since they took this 2-month gap between iGot a Hot Room and the next upcoming episode; they needed to make this next episode BIG to attract new people. (Especially this is the time that Fall series usually begins) After people know for sure that iCarly is back on air, they'll start tuning in every week (or every other week) to watch new episodes. This is of course just a speculation. I don't understand why they choose to air the episodes out of production order, but I like to watch it in the order it was made to be seen in; The story just makes more sense that way.

The reason why they show new episodes every other week is because there are 52 weeks in a year and only 26 episodes. (You have to also consider some are double episodes/movies so it's really closer to 20 episodes) so they obviously can't air the episodes every week. They have to make the series last until the end of spring or beginning of summer, at least.