Limetown

Though it’s a more straightforward adaptation of its podcast source material than, say, Amazon’s “Homecoming,” it always feels slightly off-kilter in a way that suits its thriller roots. Its characters waver on a thin edge, like a record needle straying off the track. By the time a mysterious new witness (Kelly Jenrette) shifts the show into a higher gear by making her presence known, “Limetown” is so taut with tension that I both craved and dreaded its inevitable snap.

Biel is clearly capable of handling the challenge, as she embraces another curious character at the heart of a broad mystery, earning favorable comparisons to her Emmy-nominated performance in “The Sinner.” What more “Limetown” could become is up to its makers, but Facebook Watch should have a hit on its hands — for newcomers and podcast listeners alike.

As I watched the four episodes, I felt myself trying to unpack what the show was about thematically more than allowing its ideas to come to the surface. I imagine it’s a show that can play with theme and imagination more in podcast form than the literal one of television, and the creators never quite figured out how to bridge that gap. Having said that, the mystery is more than engaging enough to keep me watching, and Biel really does a lot of heavy lifting in terms of holding it all together.