(written from a Production point of view)
Beside his work on Star Trek, Riotto guest starred in episodes of Strong Medicine (2001, produced by Whoopi Goldberg), Roswell (2002, co-starring and directed by William Sadler and produced by Tracey D'Arcy and Ronald D. Moore), Will & Grace (2003), How I Met Your Mother (2005, with Jack Shearer), ER (2005, with Scott Grimes, Leland Orser, Lily Mariye, Michael Buchman Silver, and Michelle C. Bonilla), and Gilmore Girls (2002 and 2007, with Biff Yeager).
Early film work includes the comedy Duplex (2003, with Wallace Shawn, Michelle Krusiec, Tracey Walter, Louis Giambalvo, Jenette Goldstein, Christopher Doyle, and Joey Banks), the short science fiction film 180 (2005), the thriller Single White Female 2: The Psycho (2005, with Todd Babcock and Rif Hutton), and the comedy Stress, Orgasms, and Salvation (2005, with Scott Allen Rinker).
In 2006, Riotto appeared as a contestant in the game show Deal or No Deal and in 2007 he worked as co-host on an episode of America's Next Top Model. Further acting work includes the comedy The Heartbreak Kid (2007, with Brian Vowell), the television comedies Secrets of a Hollywood Nurse (2008), Bitter Brew (2008) and How to Be a Better American (2010, with K Callan), the romance eCupid (2011), and the short comedy The Very Scientific System (2014).
He also guest starred in episodes of Parenthood (2010), Diary of a Wedding Planner (2010), Bones (2012, with Vanessa Branch and Tim Sitarz), and Go On (2012, with John Cho). In 2011, Riotto worked as production designer on the romance The Love Patient and as executive producer and director on the short documentary Finding Judy.
Among his most recent performances are the short fantasy drama Labyrinth (2015) and guest roles in Scandal (2015) and Gilmore Girls: A Year in the Life (2016, with Bonita Friedericy).