Only you can save NBC’s Grosse Pointe Garden Society! OK, that may be the grossest of gross exaggerations, granted. However, it does contain a kernel of truth.

The first clear image you’ll see in the pilot for Grosse Pointe Garden Society, the glossy, trashy prime-time murder mystery premiering at 10 p.m. Sunday on NBC (Channel 4 in Detroit), is a giant rectangular sign proclaiming “Mack Avenue Garden Center.” Mack Avenue?