Although Leonardo's Virgin, Child and St. Anne may have been commissioned as early as 1503, it was still in the artist's studio in 1517 - two years before the artist died. The painting of St. John the Baptist is instead considered the master's last known painting. This episode not only examines Leonardo's final years and those few works that were produced during this period, but also the best-known controversial works attributed to him. There are, in fact, almost as many contested paintings attributed to Leonardo as there are certain attributions.