Mare of Easttown creator Brad Ingelsby has admitted that he is still waiting for "a lightbulb moment" over a possible second season.
The drama, which stars Kate Winslet as a police detective in a small town near Philadelphia, was a huge hit in the ratings and with critics when it aired earlier this year HBO in the US and Sky Atlantic in the UK.
The show was originally envisioned as a one-off, seven-episode miniseries but its unexpected success has opened the door to a follow-up.
"If we can crack a story that is as great [as season one] and that would do justice to the characters and carry on the story in a way that was organic and yet surprising, I would love to do it," Ingelsby told TVLine.
"I just don't know what the story is. That's the issue right now."
He continued: "It may never happen. That's the reality.
"We gave Mare such a personal arc where she had to confront this loss in her life, and we would have to construct another emotional arc that was able to compete with [that].
"And I'm also acutely aware of the dangers of doing a season two just because you have the [opportunity] to do it. I would only want to do it if we were convinced we had something great."
Winslet herself recently admitted that she "would love" to return for a second season.