Assassin Probes were assassin droids used during the Clone Wars. They resembled large spiders with eight spindly legs and multiple red photoreceptors. A assassin probe attacked the squad in Operation Cold Shoulder, as soon as he saw it, Boss blasted it with the Vulcan EBF-25. Then after being destroyed, launched dozens of small Probe Killer droids through pits on their heads. The droids attacked captain Ace, but he unloaded several DC-15S rounds into the pits on its head.