Millar wrote the following episodes (usually with Gough):
- Tempest (Teleplay)
In 2001, Alfred Gough and Miles Millar developed a pilot based on the film Eraser. After watching the pilot, Peter Roth, the President of Warner Bros. Television, approached the two men about developing a second pilot, based on the young Superman concept that was brought to him. After meeting with Roth, Gough and Millar decided that they didn't want to do a series where there was lots of flying, and a cape. It was here that they developed a "no tights, no flights" rule, vowing Clark would not, at any point, fly or don the suit during the run of the show.
On April 3, 2008, after seven seasons with the show, Alfred Gough and Miles Millar issued a public statement that they would be leaving the show. The developers, after thanking the cast and crew for all their hard work, acknowledged that they never stopped fighting for what they saw as "their vision" of the show, and they passed the torch to the Executive Producers Kelly Souders, Brian Peterson, Todd Slavkin & Darren Swimmer.
- Millar and Gough co-wrote the season openers to the first four seasons of Smallville and the TV Guide comic story Elemental.
- Millar also co-wrote Spider-Man 2 (2004) together with Alfred Gough.