His twin-breakthrough came in the early 1970s; Brozius played a gator (Aernout Koffij) in the Pied Piper-themed series Hamelen and hosted the Dutch version of Runaround (Ren je Rot).

Other credits aimed at his juvenile fanbase were a Monday-afternoon radio-show, the role of a sweet-tooth inventor's son (Felix) in the 1976-taped Peter en de Vliegende Autobus-movie and the lead-voice in the original Tintin cartoon series.

In 1979 Brozius took part in the rainy third episode of Sterrenslag (Battle Of The Stars) and in the early 1980s he appeared in commercials for theme-park Efteling.

Ren je Rot had a longer lifespan than its equally successful UK-counterpart, but in 1983 parent broadcaster TROS decided to make a change after 123 episodes.

Brozius continued performing at parties, events and made guest-appearances in television series; in 1985 he played a troubled policeman in a Christmas-episode of De Poppenkraam.