Release Message:  Sisko, Bashir and Dax (Terry Farrell) are accidentally sent to San Francisco in the 21st century due to a transporter malfunction, and must figure out how to get back to return without changing the time line.

Description:  Sisko, Bashir and Dax are accidentally sent to San Francisco in the 21st century due to a transporter malfunction, and must figure out how to get back to return without changing the time line. Wikipedia: a transporter accident sends Sisko, Bashir and Dax three centuries into Earth's dark past