Videocap of a challenge supposedly a final four challenge (see oowatanite's post above) with two contestants definitely recognizable - no way of knowing for sure who the other two may be as some people are thinking of one contestant but more than likely a dreamteamer. Also, there is still debate if it is a final four challenge (though history of final four challenges seem to indicate likely) Any other people involved in a final four are spec based on other posts that may or may not be accurate.