Seth's film credits in the 1990s included roles in Not Without My Daughter (1991), Mississippi Masala (1991), Street Fighter (1994), and Harish Saluja's The Journey (1997). In 1993, he played the role of Haroon Amir in the television miniseries The Buddha of Suburbia, for which he was nominated a Royal Television Society award for "Best Actor – Male". In 1995, he played the role of Baba in Flight, for which he won the "Best Actor" award at the Sochi International Film Festival. In 1998, he played the leading role of Gustad Noble in the film Such a Long Journey, for which he won the Genie Award for Best Performance by an Actor in a Leading Role.