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.

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 reels from Sam's shocking news. Barbara struggles to bury the past.

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.

Erica is sent back to her family's 1992 Purim party, after Erica gets an unwelcomed birthday surprise from Julianne.

Erica grapples with life's biggest secret.

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

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.

Erica wishes for more control, and gets it when Dr. Tom grants her time-travel powers.

When the future of Erica and Julianne’s new company is threatened, Erica is faced with a choice: “Kill, or be killed”. Erica returns to the site of Leo’s fraternity pledge, where she learns that taking the low road often leads to a dark place.

Brent is failing to jive with the new River Rock. Erica returns to her high school days in order to help an exchange student fit in.

Erica lives her relationship fantasies on Dave and Ivan's wedding day.

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

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.

Erica demonstrates less than inspiring parenting skills when she babysits Judith's son Max for the first time.

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

Erica runs into Ethan, and they bond in both the present and past. Meanwhile, Brent and Julianne share a revelation.

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

Unnerved in her new position at River Rock Publishing. Erica must learn to step outside her shell, challenge her inhibitions and learn that her abilities are not nearly as confined as she had believed them to be.

A significant career opportunity transports Erica back to a summer spent in Taipei.

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

Erica and Adam must both confront their true feelings once and for all. For Adam, it leads to a journey into his family’s dark past, where he discovers a startling memory that he has locked away.

Erica settles for a dead-end job that can pay the bills. She is sent back to her university days, to join an exclusive secret society that she originally passed on, with the hope that doing so will finally set her on to the "right" path.

50/50 Press' new assistant, Rachel is struggling under Julianne's particular management style, while Erica tries to get to the root of Julianne's bullying.

Erica is helping ho-ho-host 50/50 Press' first holiday party, much to the disappointment of her Rabbi father. In her effort to give Adam the perfect Christmas, Erica learns the true meaning of the holidays with visits to her friends' Christmases past, and one particularly memorable Hanukkah of her own.

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

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.

Adam gets the chance to alter the regret that led him to a life of violence and crime. It’s a path that Adam is sure he cannot change - that is, until he winds up in a surprising new present.

Jenny returns, and needs help getting her life on the right track. Erica is eager to help her estranged friend, but a trip back to a day at Black Creek Pioneer Village shows Erica that the helping hand Jenny needs is her own, and not Erica's.