The so-called oncologist turned out to be more of a self-promoting hypester who was not an actual oncologist to begin with- and his successes were far overstated. Baking soda might help some cancers it can come into contact with and might help the body more easily be alkaline - and thus it might be of some benefit to you father - but in my opinion no one should try to beat cancer with baking soda alone.
There are many, many powerful cancer fighters and immune boosters out there which can be combined into a good cancer fighting protocol that also incorporates diet & nutrition, lifestyle and stress management. Here is the protocol I suggest:
Also, you asked in another post about Essiac Tea. It is a good cleanser and detoxer and a good item to include, but in my opinion it is not nearly powerful enough in fighting cancer to depend on it as a stand alone supplement.