Seymour also worked as a set designer of films including, "The Leonski Incident" (1984), and on the TV series, "Carson's Law". At the end of 1984, he auditioned with "a long line of bass players" to become a founding member of The Mullanes alongside Neil Finn on lead vocals and Paul Hester on drums (both ex-Split Enz). Seymour had played to a taped series of tracks previously recorded by Finn and Hester. The group formed early in the next year and included Craig Hooper on lead guitar (ex-The Reels). Hooper left the group and remained behind in Melbourne when the remaining trio traveled to Los Angeles to start recording sessions, where they were renamed, Crowded House.