for many years, lesch has presented a number of television series for the channel br-alpha, beginning with alpha-centauri, in which he is to be seen since 1998. in "lesch & co." and "denker des abendlandes" (thinkers of the occident), he converses with the philosophy professor wilhelm vossenkuhl about philosophical topics. alpha bis omega deals with contradiction and consistency of religion and natural science, through conversations between lesch and the catholic theologist thomas schwartz.