Yes, He did.
Confirmation from Executive Producer Craig Sweeny Speaking with IndieWire:
“I do write whatever the weirdest thing on procedural TV is at any
given moment,” he said when Indiewire spoke with him after the
screening. “‘Medium’ was very strange and ‘Elementary’ had some very
high-concept episodes as well, so I know how to inject that into a CBS
show. There was a talking fetus in the first episode and no one said,
‘Take out the talking fetus.’ We have breaking the fourth wall and
singing in the second episode and they’re not telling us to take it
out. They’re saying they like it. So, for now anyway, they’re letting
us have fun.”
Consensus from Recaps/Reviews:
Vulture - Brian Finch's Black Ops - Recap
Things get a little weird, though, when mysterious men break into
Brian’s apartment, interrupt his fourth-wall-breaking monologue, Tase
him, and kidnap him. “Oh, that’s not how it goes,” he notes.
TV.com - Brian Finch's Black Ops - Recap
And, thankfully, the episode did the smart thing by paying respect to
Ferris, especially with that familiar opening sequence, without diving
too far into shot-for-shot remake territory. This tactic was helped a
great deal by the fact that Limitless already employed a variety of
devices to get Brian talking to himself; stretching that a bit further
to a couple fourth-wall breaking nods to young Mr. Bueller only added
to Brian's shaggy dog charm off the NZT.
i09 - Arm-ageddon - Recap
So to catch the arm hacker, Brian uses NZT to become a hacker himself.
(“Did you hack the New York Stock Exchange...?” is a sentence that
escapes Rebecca’s mouth at one point.) While Brian’s breaking the
fourth wall making fun of “hackers at work” montages in TV shows and
movies, he doesn’t subject us to rapid vignettes of overly determined
typing; instead, we get Vines of cats.
IGN - Brian Finch's Black Ops - Review
After a decidedly serious episode last week, Limitless steered back
into more comedic territory with a full-on Ferris Bueller homage,
complete with character references, fourth-wall breaking monologues
and music from the 1986 film.
Some series can go their entire lives without breaking the Fourth Wall
once. Some series will occasionally break the Fourth Wall for a few
moments of comedy, but outside of that the Fourth Wall is in full
And then there are these.
A series with No Fourth Wall doesn't just break the fourth wall, it
vaporizes it. There might as well not be one. Characters will make
references to "the last episode" or "next issue". They'll criticize
the production, writing, management or even the audience. In extreme
cases, they'll refuse to go on acting. Expect there to be large
amounts of Medium Awareness, such as characters in a comic pointing
out the use of panels. No Fourth Wall often leads to characters being
extremely Genre Savvy, or frequent lampshading of Genre Blindness.