Many of the rotoscoping artists who worked on "Undone" were also part of the same team that brought "A Scanner Darkly" (2006) to life.
The car seen prominently in the promotional video for Global Creation Associates that Alma and Sam watch is almost identical to the one driven by Will Smith in the 2004 film I, Robot (2004). (A concept car called Audi RSQ) The only changes made to it here was the removal of the Audi logo on the front, and covering the distinctive hexagonal patterns where the wheels would normally be.
Before landing the role of 'Alma,' Rosa Salazar had already been a fan of Animation Director Hisko Hulsing's short animated film, "Junkyard" (2012) as well as his work in the film, "Kurt Cobain: Montage of Heck" (2015).
Siddharth Dhananjay, who plays 'Sam' on the series, is a relative newcomer to acting. His first big role came in the 2017 musical drama "Patti Cake$."
Submarine Animation, a production company in Amsterdam, creates the 3D environments you see in the series.