San Francisco journalist Dan Vasser is inexplicably transported to the 1980s, where he meets up with his ex-fiancée. He must figure out why he is there and how to explain his odd disappearances to his wife and boss.

Dan gets an MRI after doubting his time trips, but then he vanishes from a flight with Katie and finds himself in charge of delivering a baby.

Dan is transported back 18 years to warn San Francisco of a looming disaster and prevent a man from entering a life of addiction. In the present, Katie learns Dan has been in contact with Livia, despite his claims to the contrary.

Dan finds himself in 1998 following a woman who cofounded a software company, and discovers her fiancé was cooking the books. Meanwhile, Dan's trips disrupt Katie's fund-raiser gala, and the tension only escalates when he admits he sees Livia regularly in the past.

Dan tracks a former soldier accused of stealing a large amount of money. Meanwhile, Katie deals with the police after a robbery takes place the night of her gala.

Dan comes to the aid of two brothers traumatized by their father's abuse. Elsewhere, Dan and Livia eavesdrop on an intimate chat between Jack and Katie; and Jack suspects Dan has started gambling again.

Katie contemplates returning to work as a television journalist, much to Dan's chagrin. In the past, Dan must save a witness's life. Meanwhile, Jack continues probing his brother's odd behavior.

Dan attends a party in the past, where he meets a young hippie woman with ties to a murder. Elsewhere, Katie stumbles upon something interesting about Livia's past, and Dan and Jack quarrel over a probe involving Dan. John Schneider guest stars.

Part 1 of 2. Dan travels to the early '90s on the trail of a serial kidnapper (Raphael Sbarge); Katie is called to Zack's school; and Jack begins to see signs that his brother is telling the truth about his time trips.