Coming soon: “Studio 60 on the Sunset Strip!”

That is, if last night’s ratings for “The Black Donnellys” are any indication.

Despite tons of hype – there were about a half-dozen promos for it during “Heroes” just before it alone – the show managed to average a mere 8.4 million viewers in its premiere, which is what “Studio 60” averaged in its entire run. Worse, it suffered from a spectacular fall-off in viewers as the episode progressed: It began with an average of nearly 10 million viewers in its first half-hour – a number that was inflated, no doubt, by the fact that “Heroes” ran long, not signing off until 10:03 p.m. – and slunk to a lowly 6.9 million in its second half. So it didn’t lure many people to begin with and those who did watch weren’t overly impressed. Hence, we’ll no doubt be seeing Matthew Perry’s Matt returning to dithering over Sarah Paulson’s Harriet come April, if not sooner.