''TIL DEATH DO US PART,' Part Four Crazy Professor Avery from the Bureau of Experimentation and Advancement, Science and Technology (B.E.A.S.T.) has unleashed his ultimate weapon on the radioactive terror that's destroying the city. But which is worse: the mech, or the monster? Meanwhile, Ryan's girlfriend Vivian has just woken up from her coma. Which should be good news, right? But no: it's very, VERY bad.