Special Guest Stars Christine Lahti as Doris McGarrett Guest Stars Michelle Borth as Catherine Rollins Chosen Jacobs as Will Grover Sarah Carter as Lynn Downey George Cheung as Yao Fat Sean Blakemore as Supervisor Keith Harlan Co Starring Teilor Grubbs as Grace Williams Londyn Silzer as Sara Diaz Emma Schlamme as Young Doris McGarrett Stephen Fahl as Guard #3 Jacob Miller as 15-Year Old McGarrett Sebastian Siegel as Sgt. Holloway Nicolai Makana Perez as 10-Year Old McGarrett Ronald Stirrup as Guard #5