A debugger casuality feature is provided. Debugger casuality is the ability of a cooperating debugger to associate an ordered set of casuality related threads, possibly originating from different processes, as a logical thread of execution. In an illustrative implementation, systems and methods are provided allowing for the execution and management of debugger casuality within a computing environment. In the contemplated implementation casuality hooks are provided for integration with calls found in software operating in a computing environment. The hooks help attach a cooperating debugger to be able to step through a call executing in the computing environment. The casuality hooks provide the ability to step between logically related physical threads executing in a given computing environment. The physical threads ranging from single process, multi-threaded applications to multi-machine, multi-process systems. Furthermore, debugger casuality provides the ability to show the relationship between physical threads executing in a given computing environment.