The series follows Elliot Alderson, a cybersecurity engineer and hacker with social anxiety disorder, who is recruited by an insurrectionary anarchist known as "Mr.
According to Nielsen Media Research, the episode was seen by an estimated 0.545 million household viewers and gained a 0.2 ratings share among adults aged 18–49.
In Arizona, Leon (Joey Badass) has taken Mobley (Azhar Khan) and Trenton (Sunita Mani) hostage in their apartment, after killing their roommate.
As an fsociety video promises something else within 24 hours, Tyrell's lawyer (Karl Kenzler) meets with Dominique (Grace Gummer) and Santiago (Omar Metwally).
As the bombings' death toll reaches 4,000, Darlene (Carly Chaikin) is angry that Angela (Portia Doubleday) is not affected by the events, and that she claims everyone is going to be okay.
Price (Michael Cristofer) angrily confronts Zhang (BD Wong) over the attacks, who plans to move the Washington Township plant to the Congo after the annexation.
After making Trenton and Mobley bury the body, Leon takes them back to their apartment, where Dark Army agents await.
Grant reveals a code for an attack on air traffic control and refuses to let them be part of the Dark Army, saying the best sacrifice is suicide.
It is revealed that Tyrell identified both Trenton and Mobley as the people responsible for the attack and the threatening fsociety video, and that a co-worker reported them to the authorities.
Club gave the episode a "B" grade and wrote, "Whiterose is pledging faith to a different religious cult than capitalism, one where the ticking seconds on a clock are the body and blood of her savior.
"[7] Jeremy Egner of The New York Times wrote, "The lesson, as usual on this show, is that control is an illusion, a mirage that lasts precisely as long as the world's true masters allow it to.
"[8] Vikram Murthi of Vulture gave the episode a 4 star rating out of 5 and wrote, "'eps3.6_frederick&tanya.chk' stews in the depressive atmosphere created by the Dark Army.
"[9] Alec Bojalad of Den of Geek gave the episode a 4.5 star rating out of 5 and wrote, "'Frederick & Tanya' closes out the mini 'Dark Army Triumphant' trilogy that was opened by 'Runtime Error' and then continued in 'Kill Process.'
"[10] Caralynn Lippo of TV Fanatic gave the episode a 4.25 star rating out of 5 and wrote, "From the deaths of two formerly-major characters to the ancillary killings of thousands in the Evil Corp terrorists attacks, 'Fredrick + Tanya' is, at the end of the day, an unrelentingly dark hour of the series.