Alexsandr Mikhailovich "Alex" Tischenko, Ph.D. (Александр Михайлович Тищенко) was a nuclear physicist specializing in quantum mechanics working on the experimental teleporter being developed by KDEW & Associates in Cambridge, Massachusetts. When an overloading capacitor array caused the unintentional activation of the device he was, along with a colleague, sucked into a wormhole and deposited in an alternate dimension, having been transformed into a creature from ancient mythology.
Alex is the oldest son of Mikhail and Svetlana Tischenko, who were respected physicists who fled the Soviet Union in the early 1960s. Alex grew up in Oakland, California, near Lawrence Livermore Labs, where both parents worked. Alex earned his undergraduate degrees in mathematics and physics at UC Berekley, later getting his master's in physics at MIT and his doctorate from Stanford. He did post graduate work at CERN (working down the hall from Tim Berners-Lee as he was developing the World Wide Web) and did early groundwork for the Large Hadron Collider.
Upon arrival in the new dimension, Alex has been more accepting of his condition than Sam. He tends to treat the unusual situations the pair finds themselves in as more of a problem to be solved. He would rather light a candle than curse the darkness. However, his inquisitive nature can lead to trouble, especially in a universe where the rules can be fluid and unforgiving.
Initially, Alex does not get along with Sam. He laments that of all the people he could pick to be stuck in an alternate reality with, she would be the last on the list. However, thanks to circumstances (and no amount of poking and prodding from Lenny), he is softening in his attitude toward her.