^Well, technically the word "canon" does not mean "right" or "real," regardless of how fandom abuses it. It just means the core work from the original creators or franchise owners as opposed to derivative works such as licensed tie-ins or fan fiction. One can choose to believe that tie-ins ("apocrypha") are consistent with the canon and could be treated as part of the same reality, but that doesn't actually make them part of the canon, because canon doesn't mean truth, it just means the core work. In this case, the two television series are the core work, while the Cushing movies, Big Finish audios, and the like are tie-ins. Not a value judgment, just a classification.