From Damon Lindelof , the HBO post-rapture drama starring Justin Theroux is adapted from Tom Perrotta ’s book about life on Earth after the grace period ends.

The freshman HBO drama is scoring substantial growth across platforms, as lead-in "True Blood" continues to drive Sundays on the pay cable network.

Good news for The Leftovers: Four weeks into its first season, the HBO drama is finding a stable audience — and quite a bit of growth across platforms.

Sunday's outing for the drama fetched 1.6 million viewers, its most-watched original telecast since the June 29 premiere. Though that number is certainly modest compared to many HBO dramas, including lead-in True Blood, it's not even a quarter of how many viewers The Leftovers is finding over the course of a week.

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The first two episodes of The Leftovers are currently averaging more than 8 million viewers across all telecasts, HBO Go plays and video-on-demand. That's not far off from the gross viewership the most recent drama launch, True Detective, was averaging at the end of its run (11 million viewers).

True Blood remains a bit bigger — especially where live-plus-same-day is concerned. The halfway point in the vampire drama's final season averaged 3.6 million viewers during its first-run telecast this past week. Across all platforms, it's earning 10 million viewers every week.

Last Week Tonight With John Oliver is also proving to be just as solid without a comedy lead-in. The talk show pulled nearly 1 million viewers during its Sunday premiere, averaging 4 million viewers across plays during its freshman season.