TV WORTH WATCHING:

GLEE

FOX, 9 p.m. ET; 5/2/2013

The good news: Katey Sagal, from Sons of Anarchy and Married with Children, guest stars in this new episode as the mother of Artie (Kevin McHale). The bad news: She doesn’t sing, even though Sagal once was one of the Harlettes, the trio of backup singers for Bette Midler. Bring Sagal back — and let her sing next time.

-David Bianculli