Liz Marshall is a Canadian filmmaker based in Toronto. Since the 1990s, she has directed and produced independent projects and been part of film and television teams, creating broadcast, theatrical, campaign and cross-platform documentaries shot around the world. Marshall's feature length documentaries largely focus on social justice and environmental themes through strong characters. She is known for The Ghosts in Our Machine and for Water on the Table, for which she also produced impact and engagement campaigns, and attended many global events as a public speaker. Water on the Table features water rights activist, author and public figure Maude Barlow. The Ghosts in Our Machine features animal rights activist, photojournalist and author Jo-Anne McArthur.

The Ghosts in Our Machine is a 2013 Canadian documentary film by Liz Marshall. The film follows the photojournalist and animal rights activist Jo-Anne McArthur as she photographs animals on fur farms and at Farm Sanctuary, among other places, and seeks to publish her work. The film as a whole is a plea for animal rights.