https://screenrant.com/citadel-mole-mason-reveal-not-working-reason/

Citadel's finale finally revealed who betrayed the agency, but a big problem with this revelation is the Amazon thriller's lack of suspects.

Citadel Reveals [SPOILER] Is the Agency's Mole (https://www.cbr.com/citadel-mason-kane-mole/)

Season 1 of Prime Video's Citadel ends on an intense note by revealing the shocking truth behind the mole, which leads to a lot of deaths.