While with Spock's Beard, Morse released two solo albums of more conventional straightforward rock music. In 1999, he joined former Dream Theater co-founder Mike Portnoy, Flower Kings' Roine Stolt and Marillion's Pete Trewavas to form the supergroup Transatlantic. The band has released four studio albums (, Bridge Across Forever, The Whirlwind and Kaleidoscope) plus live albums from the tours behind each studio disc: Live in America, Live in Europe, , , and KaLIVEoscope. In concert, the group has included Daniel Gildenlöw of Pain of Salvation, and occasionally Ted Leonard, Morse's eventual replacement in Spock's Beard.