Specifically, they were hunting the one known as Batutut, a.k.a., the Vietnamese Bigfoot.
After searching the forest and caves at night the team did find several footprints, and they also caught something on thermal imaging that might have been a bipedal creature.
However, in the end Gates couldn't be sure that they had found evidence of a Batutut, which led some viewers to vent their frustration on Twitter.
"Destination Truth" continues on Tuesdays at 8 p.m. ET on Syfy.
TV Replay scours the vast television landscape to find the most interesting, amusing, and amazing moments - and delivers them right to your browser.
Related on HuffPost:
SUBSCRIBE AND FOLLOW
Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements.Learn more