 He is also active in Australian theatre; in 1998, Sas played numerous characters in "Black Russians", and in 2001, he featured in a play titled "The Butcher", about a butcher in a country town in decline as its inhabitants move to the city.From 2001 to 2002, he appeared in Yasmina Reza's "'Art'" with John Wood and Geoff Kelso, and in 2003, he performed in "The Corporal's Wife".Sas directed the stage version of "Closer" in 2007, starred in "Fragmented", and in "Club Gargouille", a production about Quasimodo's half-brother Modo, who runs a cabaret club.