Tony and Doug land in the War of 1812 in Louisiana, and steal som clothing that happens to have passes from General Jackson. They are captured by the British forces, led by Colonel Southall. In the present, the Project people bring in Southalll's descendent, a British general. His ancestor has a reputation as a butcher by sending his men into the strongest flank of the American forces. In the past, Col. Southall forces Tony to lead one of his men to the enemy lines, get a report, and send up a signal rocket of which flank he should attack. Tony and the scout get captured, escape, and prepare to send the signal. Meanwhile, General Southall insists on returning to the past. He's dying of cancer, and Kirk reluctantly grants the general, an old friend, his last request. The present Southall helps Doug escape and then confronts his ancestor and manages to convince him he is from the future. Doug helps Tony but the signal rocket goes astray and the attacking British are wiped out. General So

Tony and Doug arrive on Devil's Island in March 1895, where they are taken into custody as escaped prisoners. Doug manages to escape and hold the Commandant at gunpoint to convince the man he is a stranded American, but the Commandant plays along until he can get the drop on him. The Project team plan a recovery which goes awry (again), hauling in the prisoner Boudaire. General Kirk tells Boudaire that they cannot escape with Captain Dreyfuss, one of the prisoners, because historically Dreyfuss never escaped at that time, so taking him along would prevent the success of any escape attempt. Boudaire is returned but is shocked by the experience and doesn't remember his instructions. Tony and Doug stage an escape but realize that they have been led to do so so that they can all be ""shot while trying to escape."" Boudaire recalls that Dreyfuss must remain. Tony and Doug attack the ambushing guards while the other prisoners escape, and then are whisked off by the Time Tunnel.

Tony and Doug arrive at the Alamo on March 6, 1836 - the day Santa Ana wiped out the defenders. The two make it to the fort, but are put into custody when Tony tries to convince the stubborn Col. Travis the fort is doomed. Tony escapes but is captured by the Mexicans. An injured Doug captures Capt. Reynerson and tries to convince him he can see the future. When Col. Travis is killed in a fall during Tony's escape as Doug predicted, Reynerson believes him. Tony manages to escape the Mexicans with the help of a sympathetic Dr. Armandez. Meanwhile, the project team have been trying to stage a recovery, but grab Col. Travis by mistake. He is stunned, but Kirk eventually convinces him by showing him future-footage of the battle, and Travis' own death. Convinced that he must let Doug go before the massacre begins, Travis returns and frees him. The Alamo defenders are gunned down, and Tony and Doug reunite. With Armandez' aid they get Reynerson's wife out before they are whisked away.

Doug and Tony are captured by the Gestapo in Cherbourg on June 4, 1944, two days before D-Day. A scientist, Dr. Heinz Kleinemann, working for the Reich plans to brainwash Doug and allows Tony to escape. Tony falls in with the Resistance while Kleinemann successfully brainwashes Doug to beleive he is 'Heinrich Kriegler', whose father was killed by Tony. The Resistance cell is suspicious of Tony but need his electronic knowledge. Doug tries to kill Tony but Tony escapes, although the attempt further arouses the Resistance's suspicions. Tony is forced to shoot Doug later, and takes him captive. Doug reveals a traitor within the cell, and then they launch an attack on the Gestapo HQ and recover Kleinemann and the serum they need to restore Doug to normal. They succeed, and Kleinemann restores Doug's identity. The Resistance take Kleinemann into custody and Tony and Doug are whisked away as the bombing begins.

The guys land on an island in the South Pacific at the tail end of WW2. Two Japanese soldiers are holding it against invasion: the deranged Lt. Nakamura, who hates Americans, and the loyal sergeant, Itsugi. Nakamura soon fixates on the travellers, and forces them into a series of sadistic games. When the Project: TickTock staff call in a consultant to try and get a fix on the guys' location, the consultant turns out to be the lieutenant's father. Apparently Nakamura disappeared during the War and now his father wants them to recover his son. Tony and Doug manage to turn the tables on Nakamura and warn the advancing fleet. The young Nakamura, a failed kamikaze pilot, finally decides to end his life with honor by seppuku, as his father looks on through the portal.

The guys land in a Western town in the late 19th century, where they are intercepted by two silver-clad aliens. The two aliens need to steal protein to supplement their own supplies, and soon use their advanced technology to mind-control Doug and hold the confused townspeople at bay while stealing local cattle. Tony manages to get hold of one of the alien control devices. Meanwhile, at Project TickTock the same alien race but from 1966 arrive and demand to know what happened to their scouting party a hundred years earlier, believing the Project to have something to do with it. Tony manages to free Doug from mind control and defeat the aliens in the past, while the ones in the present witness the departure of the scouting party in the past and are satisfied Earth had nothing to do with their disappearance.

Doug and Tony arrive in a jungle in 1519 Yucatan as Cortez and his Spanish conquistadores attack the locals. The pair rescue natives being tortured for knowledge of a sacred golden mask and intervene. They are captured and believed to be spies. Cortez burns his ships and plans the guys' execution, but one of the locals free them and Doug buys them time to escape by threatening Cortez with explosives. Cortez orders pursuit. Meanwhile, the Project team call up an expert familiar with the terrain, Castillano. The guys use crude explosives to delay the Spaniards while aiding a local chieftain-to-be, while the Project staff discovers Castillano has a reputation for stealing artifacts, but have no choice but to employ him. When the guys get captured Castillano offers the Project staff their location in return for the recovery of the mask. When the Staff recover the mask they inadvertently lock everyone in time, and Castillano grabs a gun to force them to let him keep the mask. A demented Cas

Arriving in Gettysburg in the 1860's, Doug and Tony are separated by an explosion which seemingly gives Tony. A jolt from the Tunnel revives him but with amnesia. Doug falls in with the Union forces, while Tony becomes involved with the South and Sgt. Maddox when he is mistaken as a courier sent to buy gunpowder from an arms merchant, Michaels, who stole the stuff from the Union. Doug gets there first to find the merchant is Machiavelli! Apparently Machiavelli's pattern matches Tony's, and he was swept up and brought to Gettysburg by the Time Tunnel. The Tunnel send Machiavelli's dog back when it's about to kill Doug, draining them of power.

The amnesiac Tony takes Doug prisoner and turns him over to his sergeant, while Machiavelli delights in the carnage. Doug escapes and tries to save Tony who is determined to complete his mission. Machiavelli kills Maddox and then Doug and Tony fight when Doug tries to destroy the gunpowder. The two men come to terms but when Machiavelli tries to de

Tony and Doug arrive in Khartoum, November 2, 1883, in the middle of a battle between British and Arab forces. However, two aliens take them prisoner. The aliens plan to conquer Earth with missiles, and will be ready to launch in two hours - they send a bomb to the Project to prevent them from interfering. Tony is taken to be killed but the alien with him is forced to teleport out when the British approach. Then both guys are transferred out of the cave by the Tunnel staff, where they make contact with Captain Henderson and convince him about the aliens. The three of them attack the cave and manage to stop the aliens, with some help when the Project send the bomb back to the aliens.