"Be careful who you trust. There's a lot more to be seen and a lot more we don't know about."

'Orphan Black' Season 4: Trouble For Felix? Jordan Gavaris Talks 'Blood Ties & Biology'

Orphan Black fans should heed Kevin Hanchard's (Art Bell) latest warning. Season 4 is almost upon us, and the sestras' enemies are mounting. Three new characters are primed to enter the storyline - Shay, Rachel, and Ferdinand - and their motivations are as muddled as the clones' pasts.

"We introduce a lot of new characters; we don't know what their motives are or if they have some devious plan. There are loads of people who are a suspect this season," Tatiana Maslany teased. "Each of the clones have several people in that gray zone."

'Orphan Black' Season 4: Series Creator Teases Finale, When Will Sarah & Co Return?

Even Mrs. S (Maria Doyle Kennedy) is not above suspicion. As Sarah leaves Iceland to dig into Beth Childs' past, the sestras will have to play it close to the vest.

"With the stakes higher than ever before, Sarah and her sisters band together to uncover the missing chapter of the clone conspiracy - following Beth's footsteps into a dangerous relationship with a potent enemy who holds the key to their survival," BBC America teased.

Find out more when Orphan Black premieres April 14 at 10 p.m. ET.

Tags: Orphan Black television BBC America