Film acting debut, "Tillie's Punctured Romance"

Served in WWI

First screenplay (from play), first collaborated and co-wrote with Alfred Hitchcock, "Blackmail"; Britain's first produced sound film

Wrote original script, "King Solomon's Mines"

Relocated to USA

First US produced feature, adaptation credit for, "The Young in Heart"

Final official screenplay credit (from story) in collaboration with Hitchcock, "Foreign Correspondent"

Consulted on Hitchcock's "Saboteur"; took no credit

Feature directorial debut, "Madness of the Heart"

First assistant director credit on Douglas Sirk's, "Mystery Submarine"

TV series debut as a director, "Cavalcade of America"; later known as "The DuPont Theater"

US directorial debut, also wrote, "No Escape"; marks final segue into directing

Contributed episodes to a number of TV series including, "The Wild, Wild, West" and "Voyage to the Bottom of the Sea"

Final feature screenplay credit, "War Gods of the Deep"

Final TV credit, wrote for the series, "Land of the Giants"