Short answers, pulled from the story.
Alexander Alesius witnessed Patrick Hamilton burn alive on the 23rd of April 1528. This event occurred in the execution square in Edinburgh and served as the catalyst for Alesius spiritual revolution.
Alexander Alesius fled Edinburgh in 1532 because he converted to Lutheranism after witnessing Patrick Hamilton execution. The Catholic Church in Scotland condemned him to death in absentia for heresy and imprisoned him for preaching against the dissoluteness of the clergy.
Alexander Alesius met Martin Luther and Philipp Melanchthon in Wittenberg during his exile. He signed the Augsburg Confession there to formally align himself with the Lutheran movement.
Alexander Alesius lectured on theology at Queens College Cambridge through the influence of Thomas Cromwell. He also practiced as a physician to support himself after the anti-Protestant party prevented him from continuing his work.
Alexander Alesius returned to Germany for his second exile in 1539 following the fall of Thomas Cromwell and the enactment of the statute of the Six Articles. He was appointed to a theological chair at the University of Frankfurt an der Oder where he became the first professor to teach Lutheran theology.