On a secret mission to a troubled planet, Riker questions his psychological stability after experiencing a series of confusing vignettes.
The captain and three crew members are trapped in San Francisco in 1941 due to a holodeck malfunction, where they are held hostage by murderous gangsters.
T'Pol disputes accepted accounts, telling Archer and Trip a story about her great-grandmother and three other Vulcans crash landing in Pennsylvania in the 1950s.
Benton dazzles the staff; Lewis suspects a doctor/patient is not what he seems; Ross agrees to coach Jake's Little League team; Greene goes to Milwaukee.
The CSI team loses one of its own in a bank robbery and gun battle on the streets of Las Vegas, and Grissom deals with his hearing loss, prompting him to make a decision.