Blood may be thicker than water, but on tonight’s "The Challenge: Battle Of The Bloodlines" premiere, some teams got early evidence they should consider transfusions.

The competition series’ 27th season, which has paired “Real World,” “Challenge” and “Are You The One?” alums with new-to-TV family members, started off with a bang and immediately crowned Cohutta and his cousin Jill the first mission’s winners. But as the duo enjoyed the taste of victory, a handful of their peers were left gargling acidic defeat.

On the field, Candice got off to a pretty rough start. Leroy’s cousin could barely make it to the top of a dirt knoll in “Water Battle” -- a glorified game of King of the Hill -- and left her partner with a massive figurative mountain to climb. “I don’t even feel like doing this sh** right now,” the usually composed Leroy barked after watching his blood struggle. “I really don’t.”

And though Jenna eventually came through big for her team in “End Of My Rope,” the first “Bloodlines” elimination game, it was her partner Brianna who got her sentenced to The Pit in the first place. Next to Brianna, Candice looked like MVP, and Jenna — who clawed her way to the end of “Exes 2” — suddenly felt like she was starting from scratch with her new teammate.

“I saw her climb up this mountain without a bucket,” Cory jokingly observed of Jenna’s cousin. “How do you do that? That’s your number one goal — to fill your bucket up with water, and you don’t climb with a bucket.”

But issues weren’t exclusive to game play. After some heavy drinking, Nany’s cousin Nicole found herself in a blowout argument with Tony. Equally as fiery as her veteran counterpart, Nicole didn’t take too kindly to the way Tony spoke to women, and when Tony’s brother Shane tried to calm Tony down, the “Real World: Skeletons” alum thrust Shane into the wall like a decorative sconce, and a fight erupted between the siblings. TJ spared Tony and Shane from ejection but warned that if it happened again, they’d be out.

And though things didn’t come to blows between Vince and Cory later on at the bar, it was certainly a close call. Johnny Bananas’ cousin proved to be the game’s earliest gossip, and when he spread a rumor that Nany and Cory had slept together, Cory, whose short fuse was evident throughout “Real World: Ex-Plosion,” demonstrated his signature detonation technique. Johnny’s a proven champ, but his partner’s feather-ruffling could come back to bite him in the ass.

So, some of the “Challenge”’s new competitors have got to get into fighting shape, while others, conversely, will have to learn to keep their fighting spirits in check. Which fresh cast member is proving to be the biggest early liability? Take our poll, share your thoughts and tune in to the next episode Wednesday night at 10/9c to see if any of these guys shape up!

[funnel_poll id="challenge_jordana_12_2_15" results="true"]