Preternatural Research Bureau/Appearances

The following is a list of appearances by the Preternatural Research Bureau.

P.R.O.B.E.

 * The Zero Imperative
 * The Devil of Winterborne
 * Unnatural Selection
 * Ghosts of Winterborne
 * When to Die

P.R.O.B.E.

 * Shadows of Doubt

P.R.O.B.E.

 * The Door We Forgot
 * She Came From Another World!

Cyberon

 * The Last Dose
 * Silver-Tongued Liars
 * A Worthy Successor
 * The Blue Scream of Death