Welcome to Zodiac: Chronicle, a 24 part investigation into David Fincher's 2007 genre-altering masterpiece Zodiac. Adapted from Robert Graysmith's novel by screenwriter James Vanderbilt - who provided the introduction for this episode - and starring Jake Gyllenhaal, Robert Downey Jr and Mark Ruffalo.

Joining me today to discuss the introduction of the man who inspired Bullitt and Dirty Harry - Dave Toschi - played with heart and care from the incredible Mark Ruffalo are Senior Contributor at Film School Rejects, Meg Shields. The host of the Prog Save America Podcast, Writer at Moviefone, Former Editorial and Brand Manager for Netflix Film, the force behind Old Films Flicker, the creator of #AYEARWITHWOMEN (in which she spent one year only watching films written and/or directed by women) and #NOIRVEMBER (the yearly celebration of all things noir) - Marya E. Gates. And returning film critic at The Ringer and Cinema Scope, author of essential movie books The Coen Brothers This Book Really Ties the Films Together and the recently released Paul Thomas Anderson Masterworks - Adam Nayman. Film critic and editor at large of Empire Magazine U.K, co-host of the Empire podcast and author of the soon to be released Women Vs Hollywood: The Fall and Rise of Women in Film, Helen O’Hara. Filmmaker and screenwriter of Rounders, The Girlfriend Experience, Ocean’s Thirteen and co-creator and showrunner of Billions - Brian Koppelman. Theatre Director, Playwright, film critic and host of the Ink and Paint Podcast, Daniel Lammin. And award-winning screenwriter, and auteurist podcasting mastermind Lee Zachariah.