The fifth in Image Entertainment's I Spy DVDs contains four episodes set in Mexico. It also shows off much of what was good about this series. I Spy at its best flowed from a combination of interesting characters and unusual plots, coupled with the chemistry of the two stars, who could switch from comedy to drama in the space of a single breath. "A Day Called 4 Jaguar" is a strange episode in which Robert Culp and Bill Cosby stumble accidentally onto a case involving a missing cosmonaut in Mexico, who is bent on reviving the Aztec culture. The central performances by Rory Calhoun as the astronaut and George Montgomery as a murderous Soviet agent, make this worth watching. "Crusade to Limbo" has an equally odd plot, an assault, a kidnapping, and an attempted murder that results from Culp and Cosby's characters spotting an actor friend of Culp's on a street in Mexico City. The show makes glorious use of its Mexican locations from about 27 minutes in. One wishes that the plot moved a little faster, as it shows evidence of padding throughout, but the plot complexities -- about a political liberation movement that's a bit cavalier about the lives of its members, planning a Bay of Pigs-type invasion -- almost justify the time. There's also a comic cameo appearance by a certain VIP associated with the show in the final segment. "One Thousand Fine" concerns a gold bullion shipment lost in the Mexican jungle, with Dane Clark as an amnesiac survivor of the crash of the plane carrying the gold, who has a self-destructive nasty streak. "My Mother the Spy" offers a fine guest star performance by Sally Kellerman, playing an American agent who makes the mistake of falling in love with a Soviet operative and also becoming pregnant, though it also has a couple of ethnic jokes about Mexicans and the sizes of their families that seem slightly offensive today. The quality of the film-to-video transfer is excellent, with richer, more solid color than on any recent presentation of these episodes -- the picture is so sharp, that it's easy to spot errors in continuity that likely got past viewers in 1966, including one involving a Cosby and a pair of sunglasses in the Kellerman episode.