jalefkowit , I don’t know who needs to hear this, but pretty much the entire 1963-1989 run of classic “Doctor Who” episodes that still survive are now streaming free with ads on Tubi
https://www.digitaltrends.com/movies/classic-doctor-who-episodes-now-streaming-on-tubi/
[EDIT: I'm the United States and can confirm these episodes are available there. Availability in other regions may be different.]