[6] The cancellation came after the network's parent company Tribune Media was attempting to be purchased by conservative corporation Sinclair Broadcasting Group, which led to speculation that the latter did not approve of the subject matter of the show.

[9] On February 27, 2015, WGN America gave a 10-episode straight-to-series order for the series which is created by Misha Green and Joe Pokaski.

The site's critics consensus reads, "Underground blends credible terror with enough compelling thrills to overcome the storyline's occasional cliches.

[42] Dan Fienberg of The Hollywood Reporter gave the first season a positive review, stating that "Underground is a thriller, an adventure yarn, before it's a Brussels sprouts message drama.

The site's critics consensus reads, "Anchored by terrific performances, Underground's sophomore season shows no signs of slipping, tapping into the same sense of urgency without sacrificing its rich characterization.