Extras within TV show episode?

Hi,

I was wondering if it would be possible to have several extras, and of course the episode itself under one episode entry. So that when I select a specific episode in XBMC, I see a list of files containing the episode and several extras. This is useful for a show like Mythbusters, where there are e.g. quite a number of extra clips (e.g. slowmotion footage) per episode.

Thanks in advance!