At Prairieville's Wild West Days, Major Dennis, Danny, and Rex are asked to recreate how they captured the Pecos Gang. But Colonel Blitz, an old Nazi nemesis, enlists the escaped "Pecos" to stage a robbery for revenge and a Golden Sioux statue. A double-cross helps Rex capture Pecos. Then it's off the desert in cavalry uniforms for an Indian raid, and here Col Blitz hires thugs to grab the statue. Rex's cunning, dodging, and bulldog attacks avert a massacre and save the day.
Bobo mime-requests a vacation in Thunder Bay because the Explorers' Club is hunting Spanish treasure. Bobo dons a goofy "Professor" disguise, climbs in a tree for a nap, and dislodges an old chest - full of gold coins! Crooks grab the chest, but Bobo topples a rock into their boat, sinking them. He gets a reward and paid vacation, but opts to hang around the Sheriff's office "where nothing ever happens!"
On behalf of the government, Dr. Kirby, an old friend, asks for Rex's help finding a secret test satellite that fell into the Pacific. Diving with a special mask and tank, Rex saves Kirby from being wedged in a rock, and drives off a killer whale. Friendly natives explain they netted a "metal fish" and now worship it for good luck. But two thugs grab the satellite to ransom it back. Rex fakes being shot to get the drop on them. The satellite is safe, and the natives get a generous donation of motor boats.