Mark Felt is a lacklustre staging of a fascinating episode in recent US history. Despite Neeson’s strong presence, this is a deep throat that never finds its voice.

Ian Freer

Empire

Mark Felt is a kind of hagiography, and it leans toward whitewashing its subject's legacy, which extends even to the man's illegal break-ins and wire-tapping of the leftist activist group the Weather Underground.

Derek Smith

Slant Magazine