In addition, The Blacklist underwent a major scheduling change in December which may have contributed to the decline in views.
The final episode of 2021 was the last of the series to air during the Thursday slot, while the latter instalments have been on a new Friday night slot.
As a hugely popular slot, The Blacklist could be struggling to compete against the likes of Young Sheldon and Station 19.
Hopefully for fans, the viewership will pick up and have a steady increase, which will make the chances for a 10th season more likely.
The Blacklist seasons 1-9 are available to stream on NBC.
source: express.co.uk