Season of Giants succeeds more in ambition than in execution. This 195-minute TV movie proposes that a great professional rivalry existed between Renaissance geniuses Michelangelo (Mark Frankel) and Leonardo da Vinci (John Glover). While the Florentine and Roman scenery is authentic, certain elements of the story cause the viewer to doubt its credibility. For starters, both Michelangelo and Da Vinci weather several years' time without either aging or changing their clothes; also, the "creative process" is minimized, with both artists going from inspiration to final product in what seems to be a matter of hours (maybe Michelangelo used a roller on the Sistine Chapel). Season of Giants was originally shown in two parts over the TNT Cable service, with a surprising paucity of advertising fanfare. ~ Hal Erickson, Rovi