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Griffin Campbell and his family move to a new town and take ownership of an abandoned hotel in hopes of restoring it back to the lively vacation destination it once was.

Harper asks Griffin to meet her at the portal after school, but, when Griffin gets home, he discovers his Grandfather has arrived for a visit.

Griffin and Harper realize they've time traveled to before Savannah's disappearance. When they go back again, they think they see Savannah getting taken into the woods.

Griffin and Harper learn the camp dance is coming up, and that is the day Savannah went missing. Later, Harper meets Jess, and learns her mom did go to camp and hated Savannah.

Ben is upset by the flurry of news reports marking the thirtieth anniversary of Savannah's disappearance, while Zoey and Wyatt see it as the perfect opportunity to finally capture her ghost on tape.

Young Jess dares Savannah to spend the night in The Tremont basement with real ghosts. Young Ben comes to Savannah's defense. Young Jess storms off and wishes Savannah gone!

Griffin and Harper sneak back through the portal to find a search party looking for Savannah. Police officers begin questioning and zero in on Griffin and Harper!

Griffin and Harper escape the police and travel back through the portal. Have they run out of time... or can they still save Savannah?

Griffin and Harper use the old radio in the hidden room to lead them back to Savannah.

Griffen and Harper try to find a way to get Savannah back from 1960.

Griffin and Harper find out about another mystery and while trying to solve it travel even further back in time.

History of sulpher springs has changed after past few years what happened next events to find savannah Dillion's ghost

Preparations begin for the Tremont Hotel's grand reopening.

Harper and Griffin return to 1930 to find answers.

Harper and Daisy switch places and struggle in their new time period. Topher inadvertently shuts down the portal.

Savannah vows to help Sam, Daisy's now adult brother, complete the Time Machine in 1962.

When Sam can't get his Time Machine to work, Savannah vows to help him. Meanwhile, Griffin tells Daisy that he thinks Topher is hiding something and enlists her to find answers.

In 1930 the Tremont's must vacate their land, Daisy goes back to 1930 to switch places with Harper, and the Tremont starts on fire.

In the midst of the grand reopening of The Tremont, Griffin and Harper receive an ominous message from Mrs. Barker.

While trapped in the future, Griffin learns that the ghost is ruining their lives; Harper and Savannah try bringing Griffin back to the present.

The ghost may go, but will their future be saved?

Harper and Savannah retrieve Griffin from the future; Sam and Griffin gets the truth; Topher is in a coma in 2024; the twins and Topher almost catch Savannah's ghost.

The kids learn the ghost has been listening to them and is changing up his malevolent plans.

In 1947, Harper and Griffin meet Ruby and Sarah becomes increasingly freaked out by the ghost.