How Deep is Your Love

'''The five remaining teams head for Russia for some ice yachting and traveling deep beneath the Earth's surface. When someone continues to try and connect with another, a partner tries to keep them focused only on them instead; while someone decides to sabotage another team's run, leading to a penalty but still securing victory in the end. The rivalry between two contestants leads to one becoming overly reckless, ultimately leading to their partner paying the price; while the team comes in last in a non-elimination, they decide to stay in the game despite one's injury.'''

Plot
The teams must now take a flight to Siberia, Russia to find their next clue. The Axis of Evil alliance feign trusting one another, but are secretly planning to let the other teams think they're loyal to the alliance. MacArthur plans on targeting the Sisters due to them being the lesser threat, as compared to the other teams. Much to Josee's anger, all the teams get booked on the same flight to Russia. While on board, the Best Friends think of allying with the Sisters, but Emma has other plans in mind.

After landing, the teams must ride ice yachts in their swim suits to the Kola Borehole. The Police Cadets fall behind after MacArthur's tongue gets stuck to a trash can due to Josee pushing her. To make matters worse, the Ice Dancers mess with their yacht resulting in it malfunctioning. Carrie and Ryan refuse to sabotage one another's teams due to their friendship, much to the annoyance of their partners.

Despite their alliance, Emma refuses to help the Best Friends due to them not being in last place. After arriving at the Kola Borehole, one of the teammates must now be harnessed into the hole by the other and must find a red ball in order to proceed to the Chill Zone. The Ice Dancers face trouble in the challenge due to Josee's claustrophobia, but after motivation from Jacques and sabotaging the Sisters, the Ice Dancers manage to pull themselves into first place, but get a thirty minute penalty for not doing the challenge completely which they don't think much of. Meanwhile, the Police Cadets finally make their way to the challenge area where a faulty brake results in MacArthur getting separated from the trash can.

While the daters make their way to the Chill Zone, Carrie helps Kitty with the challenge because of their super team alliance from the previous episode. Stephanie asks Ryan to argue with her again, believing that they'll be eliminated from the competition if he doesn't do so after he pokes fun at her by agreeing with everything she says. As more teams complete the challenge, MacArthur lets Sanders fall down the hole to speed things up and ends up breaking her arm. After an emotional moment, the Police Cadets arrive at the Chill Zone in last place, however Don reveals it's a non-elimination round. Due to her injury, Sanders is given the choice of whether or not to continue, which she agrees with under the condition MacArthur listens to her now.

Cast

 * The Siberian Sasquatchanakwa is heard groaning, but it's unknown who voiced him.
 * The pilot speaks, but it is unknown who voiced him.

General

 * This is the last non-elimination leg.
 * A nuclear test dummy from Celebrity Manhunt's Total Drama Action Reunion Special is lowered into the hole when Don introduces the challenge.

Continuity

 * Josee's claustrophobia is brought up again, which was previously brought up in Shawshank Ridonc-tion.
 * MacArthur mentions her real name again, "Valentina Escobar", which was first revealed in Got Venom.

Goofs

 * Although the Kola Superdeep Borehole is introduced as being in Siberia, it is actually located on the Kola Peninsula in Western Russia, which is not considered part of Siberia.
 * MacArthur mentions that her father called her "MacArthur", even though her real name is "Valentina Escobar".