Children of the Eighth Hour, Part 1

Children of the Eighth Hour, Part 1 is the seventeenth episode of Season 4, and the first of the four part episode Children of the Eighth Hour.

Synopsis
When clearing the place out, Simon barely avoids an explosion that leaves Art's old apartment in charred ruins, apparently yet another attempt on his life. Meanwhile, Peter is contacted by John Burrell, and learns that he was behind the attempt on Simon's life.