Split Infinities

Part 1. Published in Star Trek Convergence Annual #6, 1995.
"Part one of the two-part Convergence story arc, a crossover between The Original Series and The Next Generation involving Gary Seven."
"Captain Spock's briefing about an improved Romulan cloaking device is interrupted by a high-powered transporter beam hitting the deflectors. Kirk allows it through, and Gary Seven materializes on the bridge. Before he can finish warning them that Spock is in danger, a Devidian materializes on the bridge, kills Seven and dematerializes with Spock."