Complex sentence: Other accounts point to him leaving Germany in 1939 and heading for Canada where he was interned in 1940, which unlikely as he appears in the 1940 Ealing Studios film "Convoy" released in July as the officer of U- 37, although uncredited.
Split into simpler sentences: Other accounts point to him leaving Germany in 1939 and heading for Canada where he was interned in 1940. However this is unlikely as he appears in the 1940 Ealing Studios film "Convoy" released in the July as the U- 37 German officer, although uncredited.