Four years ago Erica Strange was single, barely making enough money to get by, and had a long list of regrets. Thanks to her time-travel therapist Dr. Tom, Erica has turned her life around, but nothing can prepare her for her most difficult challenge yet - saying goodbye.

After three years of time-travel therapy with Dr. Tom, Erica has visited the past, jumped to the future, side-stepped to alternate realities, and changed her life in the process - But now, Erica has arrived in a place she never thought she would see again: Right back where she started.

Though Dr. Tom warned her not to try and prevent Leo's death, Erica does so anyway, resulting in dire consequences.

It's Dr. Tom's turn for a session as he revisits the last time he saw his daughter.

When Kai returns to give Erica a glimpse of her own mortality, it throws Erica for a loop. If Erica is to escape her own personal “Groundhog Day”, she must learn to embrace the present.

After Erica quits therapy, Dr. Naadiah sends her back to a bar in 1998, where she meets a younger, troubled Dr. Tom. A glimpse into his past, and Erica realizes it is her turn now to lend a helping hand.

Erica struggles with some big decisions, and she's desperate for a little direction. After some hide and seek in the past and present, the last place she looks to is the closest to her heart, and it opens up a world of possibility.

The surprising return of someone from Dr. Tom's past forces him to face old demons. Meanwhile Kai returns to 2010 on a regret, and Erica must make a decision that could affect both their futures.

Erica explores her feelings for Ryan by reliving an unusual love affair from her university days.

Charged with supervising the launch of Katie's new book, Erica turns into a complete control-freak. She soon realizes that her need to control might be contributing to the downfall of her relationship with Ethan.

An argument with Ethan triggers a time travel journey back to camp for Erica.

When Erica faints at a family Bris, she is propelled into the future, where she discovers Kai's true identity. Struggling to help her father in the present, and Kai in the future, Erica begins to realize the only problems she can fix are her own.

Erica grapples with life's biggest secret.

Erica receives a special gift from Dr. Tom -- a do-over day.

Erica receives a new perspective on her brother and returns from the past ready to deal with Kai.

After a shocking turn of events at River Rock Publishing, Erica discovers the value of setbacks when Dr. Tom sends her to an alternate reality, supposedly setback free.

Weeks after her break-up with Ethan, Erica is determined to pick herself up. Dr. Tom knows someone from Erica’s past who knows exactly how she feels… Claire! But she and Erica have never seen eye-to-eye.

After last season's cliff-hanger, Erica begins the final stage of her therapy as a doctor in training, and she is shocked when her first patient is revealed to be someone she knows.

Erica's "friendship" with Katie reaches a new low when Katie maneuvers her way into a book deal with River Rock.

Secrets are popping up everywhere, and when Erica gets caught in the middle, she learns of the damage keeping them can truly cause.

When trying to cope with everyone else's problems, Erica looks forward to an escape to her past. Dr. Tom, however, is changing things up... and to Erica's surprise, so is everyone else... or so it seems.

Eternally-single Erica brings best friend Ethan to pose as her boyfriend at her high school reunion. She begins to understand the source of her relationship with men by revisiting the loss of her virginity.

Erica is worried that her sister Samantha is marrying the wrong man in Josh. When she goes back to prevent Sam and Josh from ever getting together, Erica learns a big secret - one that threatens her relationship with her sister.

With the stress of work and family life weighing heavily on Erica's shoulders, Dr. Tom decides to give her a break and sends Erica back to a "perfect day."

Erica's long-simmering relationship with her mother reaches a boiling point. going back into the distant past, opens up Erica's eyes to who Barbara Strange really is.