User blog comment:Epic~00/Why Total Drama All Stars Was Such An Abysmal Season (PART 1)/@comment-24952355-20140825180238/@comment-31556666-20140825183133

They interacted once in Heroes vs Villains, and Sam likely voted for Sierra in Food Fright before he was voted off. It's probably hard to notice since they had a bunch of other things they went nowhere with.