See also: Template:Todo-Named, for accessing another article's To-do list, e.g. from a WikiProject page (can be seen in action at WP:KLF). Might also work with Category Talk pages, not yet tested.
This template employs some extremely complicated or esoteric features of template syntax.
Please do not attempt to alter it unless you are certain that you understand the setup and are prepared to repair/revert any consequent collateral damage if the results are unexpected. Any experiments should be conducted in the sandbox or your userspace.