When an old ham radio allows Det. Raimy Sullivan to connect with her father, who was killed 20 years earlier, her life takes on a whole new purpose.

1. Pilot 42m Speaking across the years, Frank learns his fate and Raimy discovers the truth about her dad. But their wrinkle in time triggers grim aftereffects.

2. Signal and Noise 42m Raimy and Frank cooperate across the decades to investigate a lead in the Nightingale case, and Raimy tries to forestall another past tragedy.

3. The Near-Far Problem 42m Working in different years, Frank and Raimy collaborate to nab a Nightingale killer suspect. Julie confronts Frank about his unreliable parenting.

4. Bleed Over 42m Trying to forestall another family tragedy, Frank and Raimy triangulate in on the Nightingale's trail of victims, and Raimy runs into an old flame.

5. Seven Three 42m While Raimy continues to cast a suspicious eye on Stan, memories of parallel timelines help point her in the direction of a killer.

6. Deviation 42m Having rattled his cage, Frank and Raimy use the Nightingale's modus operandi to lay a trap. Meanwhile, a tipster makes a startling allegation.

7. Break, Break, Break 42m The Nightingale leaves clues to taunt the police, Raimy and Satch break open a big lead in the case, and Frank confronts a shady fellow cop.

8. Interference 42m When evidence from the Nightingale's first victim yields cryptic clues, Raimy and Frank converge on a disturbing lead in the case.

9. Gray Line 42m Raimy makes contact with a crucial witness and proposes a drastic idea to stop the Nightingale. Meanwhile, Frank faces duplicity and betrayal.

10. The Edison Effect 42m While she pressures Frank to take drastic and decisive action against the Nightingale, Raimy faces her own conundrum over a missing witness.

11. Negative Copy 42m After his plans go terribly awry, Frank scrambles to protect Julie from her fate and Raimy faces unexpected consequences for an impulsive decision.

12. Harmonic 42m While Frank puts the screws to the Nightingale, he and Raimy make a startling discovery. Stan crosses the line to remove Frank as a threat.