The series picks up moments after the end of season one as Sol (Sam Waterston) is returning home to Robert (Martin Sheen) after having sex with ex-wife Frankie (Lily Tomlin).
Waterston added, “When I first started out, I did nothing but comedies and I was afraid I’d get stuck there.
Tomlin said she and longtime friend and costar Jane Fonda have gotten along famously for more than 35 years — without having “too many quarrels.”
Waterston — who led “Law & Order” for 16 years — offered advice about what he’s learned from a long career in television acting.