History
Dr Simon Tsung lost his wife, his daughter and his best friend Ethan McCain in a mysterious explosion (actually caused by his own counterpart, Damocles, tampering with the dimensions). At the epicenter of the explosion, Tsung found a glowing baby. Tsung studied the baby (referred as "Sigma") and managed to isolate the source of its superhuman powers: the Gen-factor. Then he contacted Miles Craven and Admiral Philip Cray (father of Michael Cray) for help, but when Tsung found out about Craven's experiments with the Gen-factor on unwilling subjects, he went into hiding with the help of Admiral Cray, under the watch of Maggie Monroe.
Dr Tsung raised Sigma as his own child and named him Ethan McCain after his deceased friend. He married again to a woman named Victoria and had a daughter, Celia. When Ethan became a teenager, Tsung had him train in a VR chamber to be prepared to the return of Damocles, who he knew about due to constant dreams.