Metrolight Studios has appointed James Wheelock as head of production. He will report to Jim Kristoff, Metrolight president. Wheelock was co-founder and visual effects producer for Fleet Street Pictures in San Francisco.He is exec producer for Metrolight on “Star Quest,” a theme park ride film for Landmark Entertainment for Samsung Corp. John Felser is leaving his position as manager of business development at Fox Inc. to take a position at British Sky Broadcasting in London, assisting in managing all aspects of business operations reporting to BSkyB G.M. Steve Barden. Felser has been at Fox since 1990. Vivienne Radkoff has been named story editor on “Street Justice,” a one-hour weekly firstrun series from Gladstone Gate Prods., a division of the Cannell Studios.