Plot hole: Series 2, Episode 11, The Agenda (1). The Tripredacus Council explains that Ravage will be able to find Megatron and the others by tracing the transwarp wavefront back through time to its source. If he truly did follow it back to when it started he would have arrived moments after Optimus destroyed the alien weapon in "Other Voices: Part Two" which created it, yet he arrives considerably farther in the future.