Channel 5 were promoting the programme to the media 5 months ago:
http://about.channel5.com/node/1804
It seems that you might have missed it though, because there are no scheduled showings listed on either the Channel 5 website or the Radio Times one. It was due to be shown last Friday:
http://www.reveal.co.uk/lifestyle/news/a517145/fridays-tv-pick-hens-behaving-badly.html
However, somewhat strangely, TV Rage lists that showing as the
premiere of a 4-part series:
http://www.tvrage.com/shows/id-37611/episode_list/1
So it seems that Channel 5 are either showing the 4(?) parts well apart, or that they've pulled the series for some reason.
By an odd coincidence (because I doubt that I've watched Channel 5 for several years) there was a film I wanted to watch on Channel 5 at 11pm on Friday, listed in the print edition of the Radio Times. But I didn't get to see it because Friday evening's schedule had been substantially changed. My film definitely wasn't in the listings and I don't remember your programme being there either. Perhaps they had legal problems at the last minute, preventing transmission?
Try an email to Channel 5:
http://www.channel5.com/contact-us