David Bianculli

Back in the '70s, when Sean Penn was a teenager and his dad, director Leo Penn, was working in television, Leo got Sean small roles in a few shows, including a pair of episodes of Little House on the Prairie. But since becoming a movie star, Penn hasn't starred in a TV project — until now, when he headlines a new, eight-hour drama series called The First, launching Friday on Hulu.

By now, James Corden has set a very high standard with his Carpool Karaoke TV pieces. Only a million or two viewers watch him on CBS' The Late Late Show when it's broadcast, but YouTube and other social media sites extend Corden's reach phenomenally.

The legend goes like this: On Valentine's Day 1900, at a remote prep school for young women outside Melbourne, Australia, several students and their teacher slipped away from a holiday picnic, ventured to a steep and storied landmark named Hanging Rock — and vanished.

Benedict Cumberbatch, the deep-voiced, strikingly handsome actor whose roles have ranged from Sherlock Holmes to Doctor Strange, once said there were only two roles on his long-standing acting "bucket list."

One was Hamlet, a role he played in 2015. The other? Patrick Melrose, a role he tackles — and conquers — in a new Showtime miniseries beginning Saturday. Parts of it are wickedly funny; other parts are searingly dramatic. But all of it is riveting, and excellent.

Movie star Al Pacino came to TV 15 years ago, delivering a marvelous performance as Roy Cohn in HBO's brilliant adaptation of Angels in America. Since then, every time Pacino has returned to TV, he has played real-life, controversial men: assisted-suicide proponent Jack Kevorkian in You Don't Know Jack and music producer Phil Spector in the TV movie Phil Spector.

Fifty years ago Monday, when Fred Rogers showed up on national public television as the host of what then was a brand new children's show called Mister Rogers' Neighborhood, TV was a lot different. PBS wasn't even a network then — not by that name, anyway — and aside from CBS, NBC and ABC, there were only a few independent local channels to watch, if that.

Some TV genres are perennials. They've been around since the early days of television, and probably are never going away — weekly drama series featuring doctors or cops, for example.

Other TV genres are like locusts. They get buried, lying dormant, until they suddenly resurface. On prime time TV, the game show was dead for decades until Who Wants to Be a Millionaire? brought it back. And quite recently, Netflix's Godless, like HBO's Deadwood years before it, did its best to try and revive the TV Western.

Netflix usually presents its new shows one season at a time, with a dozen or so episodes available immediately, but its latest talk show is being unveiled at the unusual rate of one installment per month.

It's called My Next Guest Needs No Introduction with David Letterman — and it's excellent. The program marks Letterman's return to the talk-show format and to series television, a journey he began in 1980 with his brief but brilliant daytime talk show, NBC's The David Letterman Show.

Producer-director David Fincher is attracted to stories and characters that are dark and complex. That's certainly true of Mindhunter, his new police drama series for Netflix — though the connections that led him there are pretty straightforward.

Way back in 1995, Fincher directed Se7en, the ultraspooky serial-killer drama starring Brad Pitt and Morgan Freeman as detectives on the trail of a murderer played by Kevin Spacey.

I loved watching Larry David last year in his recurring guest role on NBC's Saturday Night Live, where he provided a perfect impersonation of outspoken politician Bernie Sanders. But I'm even more excited to watch David, beginning this Sunday, on the return of HBO's Curb Your Enthusiasm, where he'll play an exaggerated version of himself in a role he last portrayed on TV six years ago.