On the TV series Smallville, Marshall had an important role throughout the history of the show. When Greg Beeman stopped directing high-profile Smallville episodes (due to his commitment to Heroes), series creators Alfred Gough and Miles Millar began to look to Marshall, who first began directing on Smallville during the second half of the first season.
Throughout the series, Marshall played a vital part. When Greg Beeman stopped directing high-profile episodes (due to his involvement with another show), the creators Alfred Gough and Miles Millar began assigning more duties to Marshall, who started directing on Smallville during the latter half of the first season.