“The Infiltrator” (***1/2 out of four) was a riveting, electric underworld crime melodrama based on the true story of undercover federal officer Robert Mazur (Bryan Cranston) who ended up toppling Pablo Escobar’s colossal drug empire in the 80’s by going undercover as a corrupt businessman. Director Brad Furman does a first-rate job of navigating an often convoluted story. Cranston is terrific as usual and John Leguizamo matches him in one of his best performances ever as his partner who knows no other life besides being undercover. Owes an obvious debt to “Blow”, “Donnie Brasco”, and various Scorcese crime thrillers but is still one of the best films of this year.