Agent Xavier Collins is interrogated. Samantha Redmond (codename Sinatra) begins to reassure the community as she reflects on how she got to Paradise.

Isolated, Xavier seeks answers on his own and cautiously turns to Dr. Gabriela Torabi. Meanwhile, Billy and Jane feel the pressure from Robinson's investigation.

The citizens of Paradise celebrate at the annual carnival. Xavier and Billy delve deeper into their investigation.

Xavier faces the consequences of his investigation, forcing him to consider how to proceed. Meanwhile Cal's family history and his last days are examined.

Xavier and Robinson set their plans in motion while Sinatra works to preserve the status quo in Paradise.

Sinatra and Xavier confront the past, returning to the harrowing day that brought them to Paradise.

Xavier and Robinson race to find President Bradford’s murderer before it's too late.