[4] He had his Broadway debut in 2010 playing Peter Parker in Spider-Man: Turn Off the Dark[5] directed by Julie Taymor, with music by U2's Bono and The Edge.
[7] In 2016 he performed the role of Riff in West Side Story at the Hollywood Bowl with the LA Philharmonic orchestra, conducted by Gustavo Dudamel, alongside fellow Broadway actors Jeremy Jordan and Karen Olivo.
[3] Additionally, Thomas made frequent appearances on numerous British television shows, including Wonderful You, The Bill, Bad Girls, and Stephen Poliakoff's The Lost Prince, among others.
[11][13][14][15] In 2008, Thomas was cast as Jeremy (Jez) Tyler in the ITV television drama musical, Britannia High, created by Arlene Phillips.
[17] In 2010, Thomas appeared in an episode of the ITV series, Midsomer Murders alongside John Nettles, Sylvestra Le Touzel, Lydia Wilson, and Richard Fleeshman.
[18] Also in 2010, Thomas ventured to New York City and Broadway where he earned a role as the alternate lead in Julie Taymor's Spider-Man: Turn Off the Dark.
He left the show to perform in the lead role in the American Repertory Theater's revival of Pippin, directed by Diane Paulus.
Almost immediately after arriving, he received a phone call asking him to reprise his role as Pippin for the U.S. national tour, which was opening in Denver in eight days.
[29][30] In 2017 he appeared in the main cast of another pilot episode, for a planned medical drama, Shelter, created by Law & order veteran Warren Leight, but the series was again not picked up.
[32] Thomas' performance in Pippin earned him a nomination for Outstanding Lead Actor in a Musical by the Outer Critics Circle Awards.