The reading also featured Kevin Kline as Mueller, Joel Grey as Jeff Sessions, Jason Alexander as Chris Christie, and Alfre Woodard as Hope Hicks. Annette Bening narrated, and Mark Hamill, Julia Louis-Dreyfus, and Sigourney Weaver made recorded video appearances.

Others who joined the cast included Alyssa Milano, Zachary Quinto, Ben McKenzie, Michael Shannon, Justin Long, Piper Perabo, and more.

Lacking a set, the reading rested on the chops of the veteran actors, who sat behind music stands wrapped in patriotic bunting and stood when it was their turn to speak. The actors' charismatic rendering of the lengthy report garnered bursts of laughter and buzz from the audience.

The Investigation was created by Emmy-nominated playwright, screenwriter and actor Robert Schenkkan. He received a Pulitzer Prize in 1992 for his play The Kentucky Cycle, and his play All the Way won a Tony award in 2014.