The series revolves around a computer program for the federal government known as "The Machine" that is capable of collating all sources of information to predict terrorist acts and to identify people planning them.
The title refers to "Sotto voce", which is used to denote emphasis attained by lowering one's voice rather than raising it, similar to the effect provided by an aside.
According to Nielsen Media Research, the episode was seen by an estimated 5.49 million household viewers and gained a 0.8/3 ratings share among adults aged 18–49.
In Mexico, two men force a family to drop out of their truck in the desert after only getting paid a short amount of money.
However, the men are subdued by Shaw (Sarah Shahi), who gives the keys to the truck to the family and leaves to walk on foot.
Back in New York, Reese (Jim Caviezel) is following their new number: Terry Easton (Neal Huff), a locksmith.
Finch decides to ask Elias (Enrico Colantoni) for help, which he accepts and takes him to an elementary school to meet with one of his associates for information.
Back at the precinct, Easton receives a phone and a knife from an unknown person and is instructed to open the cells with Templarios gang members but Reese stops him.
In its original American broadcast, "Sotto Voce" was seen by an estimated 5.49 million household viewers and gained a 0.8/3 ratings share among adults aged 18–49, according to Nielsen Media Research.
By the end, Fusco knew the truth, Shaw returned (not quite right), and Finch made a 'deal with the devil' choice about how to handle this week's villain.
Thankfully, 'Sotto Voce,' which is all about friendship and trust, lightens the mood a bit as we see two of our wayward Team Machine-mates work their way back into the fold.
"[6] Sean McKenna of TV Fanatic gave the episode a 4.6 star rating out of 5 and wrote "After all, while it's great we finally got the team all together, they may just need Elias one more time in their fight against Samaritan.