Also ask the good folks at:

https://missingepisodes.proboards.com/board/1/missing-episodes-general-tv

They will likely be able to access databases such as TVBrain to see if the programme exists.

https://www.tvbrain.info/tv-archive?showname=aquarius&type=lostshow

You could also ask the good folk at Kaleidescope. This is the first port of call for 'missing' tv progs. - they have a huge archive donated by producers, tv companies, etc. The director is one Chris Perry.

https://en.wikipedia.org/wiki/Kaleidoscope_(organisation)

SB