Guest Stars Tom Mulheron as Luka Malinovsky Seth Somers as Sean Redmond Jack Wilkinson as Aaron Bayliss Ravin J. Ganatra as Kareem Hussein Gina Isaac as Astrid Watson Polly Lister as Jordan Smith Paul Blair as Frank Godfrey Laura Bayston as Colleen Caldwell Jensen Clayden as Sam Caldwell James Lawrence as Alex McGrath Immanuel Yeboah as Jas Radcliffe