Sometimes in a new ensemble series, the most fun to be had is in watching actors pop up from past lives on other shows looking older, more seasoned and somewhat weary.

In “Swingtown,” a promising, recently cancelled show about sexual experimentation in the freethinking ’70s, the terrific Molly Parker turns up, still smart and sexy, as does the underrated Grant Show (“Melrose Place”).

Grade: B

Swingtown – The First Season is currently available.