The final episode of "Orphan Black" left the audience with Helena in military custody and Sarah unaware of the situation.

Sarah has no idea that her clone sister was in danger and that left fans wondering what will happen to Helena. Once Sarah knew that Helena was in trouble, she will do the best she can to save her. There are speculations that Mark, who was revealed to be one of the male clones, will play a major role in rescuing Helena with the aid of the Clone Club.

According to rumors, Mark resembles one of the guards who took Helena in. Once Sarah realized who took Helena, it was only a matter of time before she could devise a plan to use Mark to sneak in the military base to save Helena.

Executive producers John Fawcett and Graeme Manson confirmed that the military has its own male cloning project named Project Castor. Fans were surprised that the final episode showed that Mark is one of the male clones.

"What's interesting about this is that Ari Millen is a really talented guy and he's someone that we had brought in as this new Prolethean character, and we had planned to kill him in episode 6. After he did some significantly great work for us in the early get-going of the season we started to focus our eyes on him as very strong potential for our male clone, and that's kind of how that happened," Fawcett told Entertainment Weekly.

It is most likely that Sarah will seek the help of Mark in this mission as he owes Helena big time. Helena helped Mark and Gracie get away after she attacked the Prolethean leader Hank. Thus, Helena is the one responsible for the happiness that Mark is experiencing right now with his woman. Mark seemed to be the type who will help Helena in time of need.

BBC has yet to announce the premiere date of "Orphan Black" season 3.