As a scriptwriter Michael Miller has written numerous episodes for such series as R.F.D.S. (1993), Correlli (1995), Heartbreak High (1996), G.P. (1992-96), Fallen Angels (1997), Raw FM (1997), Wildside (1997-1998), Water Rats (1997-2000), Love Is a Four-Letter Word (2001, which he also co-created), Farscape (2002), Young Lions (2002), White Collar Blue (2003), Blue Water High (2005), The Secret Life of Us (2003-2005), All Saints (2007-2008), The Strip (2008), East-West 101 (2007-2009), Dance Academy (2010), Lockie Leonard (2007-2010), Miss Fisher's Murder Mysteries (2012), and Conspiracy 365 (2012).
He has also written telemovies, including Exposed! Pro Wrestling's Greatest Secrets (1999) and Go Big (2004).
Miller has also been engaged as producer on a number of television series and specials, notably World's Most Daring Rescues (1997), World's Deadliest Storms (1998), Love Is a Four-Letter Word (2001), and Go Big (2004).