The Unauthorized Saved by the Bell Story 9 p.m., Lifetime
That “unauthorized” in the title is unlikely to deter any viewers who spent their Saturday mornings hanging out with Zack (Mark-Paul Gosselaar), A.C. (Mario Lopez), Kelly (Tiffani-Amber Thiessen), Jessie (Elizabeth Berkley), Lisa (Lark Voorhies), Screech (Dustin Diamond), and Mr. Belding (Dennis Haskins). Judging by the first five minutes that were available for review, this behind-the-scenes look is taking the warts-and-all approach. The casting directors have done a fair-to-good job of finding doppelgangers for the original gang.
CBS Fall Preview 8:30 p.m., CBS
The Eye network offers a sneak peek of what’s to come this season with this half-hour promo special. Keep an eye out for New Kid on the Block Joey McIntyre in the Boston-set sitcom “The McCarthys,” the latest “NCIS” spinoff (this one set in New Orleans with Scott Bakula), and Tea Leoni as “Madam Secretary” (of state). Jim Nantz
(pictured) hosts, the better to hype “Thursday Night Football.”
Running Wild With Bear Grylls 8 p.m., NBC
Tamron and the Bear head to Utah.
Mistresses 9 p.m., ABC
Try, try again.
Under the Dome 10 p.m., CBS
Global warming comes to the dome.