How did the budget of UNCLE compare to Trek's?
Good question! And the network license fee also. There could have been other motives behind NBC's choices...
I posted the following a year ago:
Bob Justman said:(report dated 8/28/67):
Mannix: $213,378
Mannix: $224,602
Mission: Impossible: $218,004
Star Trek: $189,696
Star Trek: $195,674
Voyage: $166,485
Man From U.N.C.L.E.: $150,158
Wild, Wild West: $181,108
Bonanza: $167,870
Gunsmoke: $192, 326
Batman: $184,232
These must be the budgets of select episode rather than season averages (explaining why there are two numbers for Trek and Mannix). The Batman number represents the cost of shooting two half-hour episodes.
From memory, as a rule of thumb, the network licensing fee was about 2/3rds of the show's budget. The studio was responsible for the remaining 1/3rd (and overages). Contractually, the network paid more each season the show was on the air (in other words, NBC spent more money per episode on season three of Star Trek than season two, and more money per episode on season two than season one).