Intelligent Design: A hypothesis wherein given features of life v non-life are explained by an intelligent cause, not an undirected process such as natural selection.
Excellent! Then, our next task is to define "panspermia"; a definition of which, much to our convenience, is provided at Wikipedia as follows:
Panspermia: A hypothesis that the seeds of life are prevalent throughout the Universe, and furthermore that life on Earth began by such seeds landing on Earth and propagating.
So, is that our definition of "panspermia"?