Beauvais returned to Germany in 1945[2] or 1946[3] with the United States Army, for whom worked as an interpreter, including for the Nuremberg Trials, and as a theatre officer.
From 1962 to 1967, collaborating with the writer Horst Lommer, Beauvais directed a popular series of films for NDR.
Beauvais adapted for television literary works by writers including Arthur Schnitzler, Anton Chekhov, and Joseph Roth, and directed Eugene O'Neill's Trauer muss Elektra tragen (Mourning Becomes Electra), starring Peter Pasetti.
He also adapted and filmed works by contemporary writers including Siegfried Lenz, Karin Struck, Adolf Muschg, and Martin Walser, and original teleplays by writers including Peter Stripp, Daniel Christoff, and Horst Lommer.
[3] He also won a posthumous Grimme Prize (with gold) in 1988 for Sommer in Lesmona (Summer in Lesmona) (shared with Reinhard Baumgart, Katja Riemann, and Herbert Grönemeyer),[citation needed] and a Bambi Award, in 1968, for Zug der Zeit (The Locomotive of Time).