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Best friends Shelby and Cyd gain the unpredictable power to travel back and forth in time when one of their friend Barry's science inventions goes awry. With their newfound power, the teen besties try to fix the mishaps that spoiled Shelby's plans to ask her crush Cameron out to the school dance.

When Cyd and Shelby are having trouble studying for a difficult history test, they decide to jump ahead in time and nab the test questions. Meanwhile, Barry and Naldo find themselves in a hair-raising situation when they try to figure out how to make Barry’s invention replicate time travel.

Shelby and Cyd encourage a homesick Daisy to incorporate a festive 16th-century tradition into their annual Christmas party.

Cyd and Shelby travel back to relive one of their favorite memories from middle school, but the moment winds up being totally different than what they both remembered. Now, they begin to question everything that happened on that particular day.

When Cyd tries to plan a special thank you for the Marcus family, Shelby steps in to help with hulu dancers, a rock band and jugglers and everything somehow leads to a big misunderstanding and a huge kitchen disaster.

Diesel swallows a time travel tracker and disappears; Shelby and Cyd hurry to track him down before he's lost forever.

When Cyd tries to protect Diesel from Barry’s wolf serum experiment, she accidentally gets the serum on herself and turns into a menacing werewolf. Now Shelby must try and figure out how to get her best friend back before the she-wolf destroys their high school’s Halloween carnival.

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Things spin out of control when Cyd travels back to Christmas the year before to try and figure out the perfect gift for Shelby. Meanwhile, Barry and Naldo's Winter Wonderland experiment sparks an elf war with Bret and Chet leading the charge.

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Shelby and Cyd get their first jobs at a fudge kiosk at the mall, but the job is not all that Shelby thought it would be.

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When Cyd and Shelby attempt to change the past so that Barry can meet his childhood science hero, they travel to a period where Naldo and Barry are rock musicians instead of scientists.

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The girls decide to take Daisy on an official "Epic Girl's Day" at the mall since she might be here longer than expected.

Barry is too busy to help Shelby build her website so she takes matters in to her own hands; Cyd and Naldo win a boat and try to hide it in the backyard.

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When Janet unexpectedly invites herself over to Shelby's for dinner, the girls use the opportunity to find out what she knows about time travel.

While Janet tries to uncover the secret behind time travel, the girls decide they need to take her down once and for all!

A princess named Daisy has come through the time rift from the 16th century and finds herself at Cyd and Shelby's school.

Cyd and Shelby watch roller derby against Astrid's wishes; they find out Shelby's mom has been lying.

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When the girls travel back to the 70's for help on a report, they land right in the middle of a turf battle between punk and disco kids.