https://www.metv.com/stories/the-united-states-military-kept-tony-dow-off-tv

His career never really reached those same heights again.

The National Guard doesn’t take much time away from normal work as long a so your deployed except for during initial or basic training and MOS training. So as an actor it would be fairly easy to stay under contract and do recurring role in show, guest starring roles, and roles on episodic TV. What would have done as photographer/Combat Photographer in a National Guard unit that wasn’t sent to Vietnam?
1963–1965
1 episode of Dr Kildare
1 episode of The Eleventh Hour
1 episode The Greatest Show on Earth
1 episode My Three Sons
5 episodes Mr Novak
33 episodes Never Too Young (Sept 27-Dec 31)
1965 or 66-1968
120 episodes Never Too Young ( Jan 3-Jun 24)
1 episode NBC Children’s Theatre
3 episodes Lassie
IMDb
Was Never Too Young daily like daytime soaps or weekly?