Transatlantic were a multinational progressive rock supergroup consisting of Neal Morse (ex–Spock's Beard), Roine Stolt (Kaipa, the Flower Kings), Pete Trewavas (Marillion, Edison's Children) and Mike Portnoy (Dream Theater).

[2] Their first album, 2000's SMPT:e (a play on words, as both a combination of the members' last initials, as well as a common machine time protocol used in high end recording studios) received strong critical reviews, including "some of the best progressive rock music ever written" (Robert Taylor in AllMusic).

The band showed their musical heritage on the live CD, presenting covers of the Beatles' "Strawberry Fields Forever", as well as a medley of Genesis' epic "Watcher of the Skies" and "Firth of Fifth".

As an added bonus for progressive metal fans, Daniel Gildenlöw of the band Pain of Salvation sat in throughout the tour, playing keyboards, guitars, percussion, and vocals.

Morse left his regular band Spock's Beard in October 2002, stating "God wants me to do something else," which meant leaving the mainstream prog scene to launch a new career as a Christian musician.

A three-quarter reunion took place on 23 August 2008, when Stolt and Portnoy joined Morse at the Three Rivers Prog Fest in Pittsburgh for "We All Need Some Light" and "Stranger in Your Soul".

On 10 March 2013, Pete Trewavas announced at the Marillion Weekend Convention in Port Zélande, the Netherlands, that he would be going to Nashville in the Summer to record new material with Transatlantic.

The band played two shows, with the first featuring the entire Kaleidoscope album and the second including guest performances by famous progressive rock artists such as Jon Anderson of Yes.

[12][13] On 5 June 2021, Mike Portnoy announced on his Twitter feed[14] that Transatlantic would be playing at Morsefest 2022 outside of Nashville, TN on 29–30 April 2022 as a warmup gig for Cruise To The Edge.