with Stefano Aglì (drums on "Season 2") and Tony Franklin (bass on "Season 1")
with Gregg Bissonette (drums on "Season 1")
with Alessandro Del Vecchio (co-producer on "Book A")
with Donald D. Docker, Andrea Rampa, Magnus Jacobson, Davide Ronfetto and Janthana Rodjakkhen ("Season 1")
with Goran Edman (vocals on "Season 1")
wIth Guthrie Govan (guitars on "Season 1") + Bryan Beller
with Magnus Jacobson (drums on "Season 1")
With Anna Petracca (live vocals 2013)
With Valentina Procopio (vocals on "Book A")
with Davide Ronfetto & Andrea Rampa (spoken voices on "Season 1", actors in the "Darwin's Tears" short film, live members 2013)
with Helly (drums on "Book A", "Season 2", live)
With Elize Ryd (vocals on "Book A")
with Amanda Somerville (vocals on all albums), Alessandro Del Vecchio (co-producer on "Book A") and Janthana Rodjakkhen (spoken voice on "Season 1", Eternity in the "Darwin's Tears" short film)
with Silos Production ("Darwin's Tears" short film)
with Silos Production ("Darwin's Tears" short film)
with Giulia Bencini, Kelly Massenz and Valentina Mosca (The 3 Muses in the "Darwin's Tears" short film)
With Giulia Bencini, Kelly Massenz and Valentina Mosca (The 3 Dark Religions in the "Darwin's Tears" short film)
with Fabio Rancati (The Chronomaster Project mastermind)