Ok...hard to be critical about any plotline as absurd as a leprechaun, let alone in space..but, for my money, the first three still take some beating.
Warwick Davies always manages to do wonders with even the thinnest of plots, and this particular outing seems to ramble at times...almost as though the script is being written as they go!
Buy this one though..it's still a laugh.
Ownership of the first three, however, is a real must.
But, for goodness sake avoid Lep In The Hood like the plague..it's truly dreadful!