Delphine may return stronger than ever in 'Orphan Black' Season 4 despite of being shot in the previous season finale. In addition to that, Susan also comes back with an explosive comeback. Other than that, Maslany talks about the unfolding mysteries that fans will see in the upcoming season.

Graeme Manson, writer and co-creator of the show talks about Delphine Cormier's fate (Evelyne Brochu). Manson told The Hollywood Reporter, "We wanted to make a strong choice with the character this season and work with Evelyn to craft the role of Delphine." The co-creator adds that if Delphine is coming back, her gunshot wound remains to be seen in Season 4.

On the other hand, Susan Duncan's (Christy Bruce) presence will be a part of a shocking mystery as mentioned on The Daily Beast. Rachel's mother who was thought to be dead will return fully alive in 'Orphan Black' Season 4. Manson also stated that if Rachel is with her mother, then she's with the only surviving creator. 

Moreover, lead actress Tatiana Maslany (who plays the character of Sarah Manning) gave some teasers to Deadline about the new season. Maslany stated that the 4th season is filled with new mysteries that will make a change of direction for the show.

Tatiana reveals that fans will expect more explosive mysteries in the upcoming season of 'Orphan Black'. This includes Delphine surviving the gunshot as she returns stronger in Season 4. Also Rachel's mother, Susan is revealed to be alive and creates a major comeback.

As of now, BBC has not given any information of when 'Orphan Black' Season 4 will be released. However, they said that the show will premiere anytime soon in 2016. 'Orphan Black' is a Canadian science fiction TV Series written by John Fawcett, Graeme Manson, Alex Levine, Karen Walton.