be expected, and each will affect more advanced life forms, people being the last. Ryer and Rand return to Time Safari to try to fix what has gone wrong along with the government. Unfortunately, another time wave strikes that leaves the city without power and now covered by dense vegetation. Evaluating the machine's logs, they find that the Eckels/Middleton expedition had come back a few grams heavier and that the bio-filter was turned off and recognize that they can use the time machine to go back to intercept their past selves so as to prevent whatever happened, but will only have a few seconds to act, and so must work to figure out who they need to stop. The Time Safari finds their equipment and gear free of anything, so Ryer and Rand lead a group through the city - now filled with evolved and deadly hybrids and other new hazards that kill some of their party members in order to find Eckels and Middleton. Eckels is safe but asserts he remained on the path, while Middleton, poisoned by the new wildlife, commits suicide before they can stop him. Afterwards, they are able to find a dead butterfly on the sole of the shoe he used for the safari. The party makes it back to Time Safari after more time waves hit, now finding the time machine partially underwater and unusable. Rand obtains the hard drive containing the TAMI software with plans to use it with the nearby university's particle accelerator as a substitute time machine. With Ryer and Rand as the only two survivors, they finally make it to the university, Rand noted that the appearance of simian-like Babboonlizards from the latest time wave means the next one will wipe away humanity. Rand prepares the accelerator and stays behind while Ryer goes through the time portal, just as the last time wave hits turning Rand into a humanoid catfish-like creature. Ryer catches up to the previous expedition, catches Middleton to prevent him stepping on the butterfly, tells team member Jenny that the bio-filter is off at the same time asking her to give his earlier self a recording of the events he has witnessed before vanishing. The expedition returns without incident to the future they had left and Ryer shares the footage with Rand, presumably to use it to bring down Time Safari, and make sure nothing like this