Origin
Burt at one point began to work for The KGB and became familiar with Sophie.
Creation
Burt was created by Christopher Priest (A.K.A. Jim Owsley) & Mark Bright. He appeared in Spider-Man vs. Wolverine #1.
Major Story Arcs
High Tide
Burt and Sophie were acting as undercover agents in Hell’s Kitchen but were killed by Charlemagne. Spider-Man later found their dead bodies.