After the company folded following the stock market crash of 1929, Knox returned to London, Ontario where, for the next two years, he worked as a reporter for The London Advertiser before moving to London, England where, during the 1930s, he appeared in several films.
Setelah perusahaan tersebut dicairkan pasca perpecahan pasar saham pada 1929, Knox pulang ke London, Ontario dimana, selama dua tahun berikutnya, ia bekerja sebagai wartawan untuk The London Advertiser sebelum pindah ke London, Inggris dimana, pada 1930an, ia tampil dalam beberapa film.