Lizzy Caplan's character has a complicated relationship with her estranged father, played by De Niro. It all added to the experience of working on the gripping new series, writes Esther McCarthy

For Lizzy Caplan, joining Netflix's "Zero Day" was an easy decision to make, citing Robert De Niro's involvement, as well as the "solid" credentials of co-creators Eric Newman, Noah Oppenheim and Michael Schmidt.

I loved those scenes,” Lizzy Caplan told DECIDER. “We knew from very early on that there was a rich history that we wanted to convey.” That history includes Alex’s deceased brother, Nick (Jackson Eick).