About 10.4 million people caught Fox’s unveiling of its highly hyped serial-killer drama “The Following” at 9 p.m. Monday.

Claire Matthews (Natalie Zea, R) gives Ryan (Kevin Bacon, L) an important letter regarding her ex-husband in “The Following.” (Bob Mahoney/Fox)

Fox notes this is a bigger crowd than it scored with either of its Monday drama debuts last season – “Alcatraz” (10.1 million viewers) or “Terra Nova” (9.2 million).

This, you could argue, is damning with faint praise, given that Fox canceled both those shows at the end of their first, 13-episode-ish seasons.

“The Following” is this TV season’s most expensive primetime series, costing advertisers about $200,000 for a 30-second spot, according to Ad Age.

“The Following” stars Kevin Bacon as a former FBI agent dragged back to help wrangle a college lit prof turned serial killer who’s been building a cult of copycat serial killers.

Besides being Fox’s highest profile freshman drama this season, it’s also enjoying lots of media attention what with it in the right/wrong place at the right/wrong time, what with it becoming a talking point in the current debate about Hollywood’s role in recent real-life mass killings.

For all that, “The Following” wound up tied with “Elementary” -- CBS’s Sherlock Holmes re-imagining – as the TV season’s second highest rated drama debut among 18-to-49-year-old viewers who are the currency of television ad sales.

This, you could argue, is damning with faint praise, given that CBS is... well, CBS.

Anyway, still ranking as the TV season’s No. 1 drama in that key age bracket: “Revolution.” Congrats, NBC.

In its Monday hour, the launch of “The Following” finished second among 18-to-49-ers — behind CBS comedies “2 Broke Girls” and “Mike & Molly.”

The majority of the Kevin Bacon starrer’s audience – about 5.8 million of them — was aged 50 and older, according to Nielsen.

This, you could argue, is...oh, never mind.

Perhaps anticipating the preliminary perfectly-okay-but-not-eye-popping stats, Fox on Monday touted to New York Magazine’s Vulture web site its “set your DVR now” mention in “The Following’s” launch campaign.