Actually, what I hope they'll do (although they won't - they need the revenue) is tell the three contestants who haven't participated in a trial yet (Vic, Nancy, Sheila) that they have to do the next one. Then everything's fair and equal - almost.
I clicked on the info page earlier today on the Wanadoo tv guide and it said that "tonight is the last day before the eviction tomorrow" so looks like it will be a trial tonight, I would imagine this is due to Brian leaving.