Did you try hulu.com? I tried to look there for you, but it’s being slow for me. Good luck- I love Josh Gates!
http://www.fancast.com/tv/Destination:-Truth/95845/full-episodes
http://tv.blinkx.com/show/destination-truth/R9tmK1PgBdSCWB-A#s3e10
http://www.freetvonline.com/Visitors.php
http://www.hulu.com/search?query=Destination+Truth&st=0
Er we go…