Guest Stars Sarah Davenport as Ivy Brown Erin Cahill as Stephanie Fisher Catherine Dent as Dr. Marion Goodkin Dawnn Lewis as Arlene Grant John Posey as Fred Overmyer Pat Skipper as Spencer Clayton Rohner as Rudy Grant Co Starring Sola Bamis as Ayo / Medical Ross Kurt Le as Alex / Sub-Bio Tech Cameron Britton as Tim / Engineering Manager Chelsea Vincent as Chelsea / Life-Sci Amanda Westlake as Peggy Newcomb Sebastian Cole as Young Rudy Grant Jully Lee as Ground Control Jesse Posey as Young Fred Overmyer Lennon Kay as Young Arlene Grant Sky Soleil as Pog Newcomb