I never heard of “Herman’s Head.” If you look at my “tag line” you’ll see one reason I have no knowledge of sitcoms in the late 70s and early-mid 80s. I do remember AFRTS playing “One Day at a Time” during my 2d tour with 3d Armd Div.
Herman’s Head ran about 3 seasons, it was on Fox back in the very early 1990’s, probably can find it on YouTube.
https://www.imdb.com/title/tt0101115/?ref_=nv_sr_srsg_0_tt_6_nm_2_in_0_q_herman%27s