When does Frequency return?

In 2016, NYPD Detective Raimy Sullivan discovers she is able to speak to her deceased father in 1996 via his old ham radio. Her attempts to save his life trigger the "butterfly effect", changing the present in unforeseen ways. To fix the damage, she must work with her father across time to solve a decades-old murder case. The series was canceled on May 8, 2017, an epilogue to the series was released.
In 2016, NYPD Detective Raimy Sullivan discovers she is able to speak to her deceased father Frank Sullivan in 1996 via his old ham radio. Her attempts to save his life trigger the "butterfly effect", changing the present in unforeseen ways. To fix the damage, she must work with her father across time to solve a decades-old murder case.