Running as fast as he can

Turning back the clock has its repercussions, as the title character in "The Flash" learns in the somewhat confusing, somewhat satisfying season premiere of the Marvel series. Grant Gustin is dashing enough to play the superhero on the big screen, but for now he's doing a decent job on TV, keeping up with the fast-paced plot and the less-than-captivating roster of bad guys.

7 p.m., WUCW, Ch. 23

Making a difference

TCM's "Trailblazing Women" will honor female film pioneers every Tuesday and Thursday this month, starting with a slate that includes Mary Tyler Moore ("Thoroughly Modern Millie") and Lucille Ball ("Yours, Mine and Ours"). The first marathon, sprinkled with interviews conducted by movie buff Illeana Douglas, kicks off with a 2008 documentary honoring Mary Pickford.

5 p.m., TCM

Totally tubular

King Bach may not be getting his star on the Hollywood Walk of Fame anytime soon, but he's well known in the social media world, with the most followed account on Vine. He takes a break from posting to host the Sixth Annual Streamy Awards, which honors the best in online video. I'm guessing this is one ceremony where live tweeting is strongly encouraged.

8 p.m., YouTube

Neal Justin