Guest Stars Vesper Ruck as Baby Kayla Skyla Fowler as Baby Kayla Devery Jacobs as Britney Joey King as Kayla Mireille Enos as Rebecca Cas Anvar as Sam Nicholas Lea as Detective Barnes Alan van Sprang as Greg Peter Sarsgaard as Jay Patti Kim as Detective Kenji Rodrigo Fernandez-Stoll as Band Member Dani King as Trini