ST:TOS - What does ST:TOS stand for? The Free Dictionary
References in periodicals archive
Notably, a 1996 episode of Star Trek: Deep Space Nine, 'Trials and Tribble-ations' (5: 6) returned to the time frame of ST:TOS
episode 'The Trouble With Tribbles' (2: 15), featuring new effects work with the 1960s-era USS Enterprise.