A couple of days ago I downloaded all 6 episodes of Peter Kay's Car Share from the iPlayer to my Sky+ HD box, and watched the first two episodes.
Went to watch the next episode this morning, and it's all disappeared?
It's no longer in my planner, and on iPlayer it now only shows episode one for download.

Where did it all go? And why haven't I still got it all?

It was on a preview before the series broadcast on the main channels.

It expried from iPlayer at midnight on Tuesday hence its away from your planner.
Episode 2 next Wed

Episode 2 is on tonight at 9.30?

And what's worse it gets better with each episode, so glad I caught them all at the weekend.

All 6 episodes are available to download from the usual sites