When guest-star William Shatner's character appears on a vid-link, the caption underneath him reads "JTK NCC 1701" which stands for "James T. Kirk", the character he played on Star Trek (1966) and the registry number of the U.S.S. Enterprise.
The helicopter used in the attack at the beginning of Hide and Seek was the modified Bell 222 used in the show Airwolf (1984).
Both William Shatner and Christopher James Miller appear in Star Trek: Generations (1994). Shatner appears as Kirk, of course, and Miller appears as Rene Picard. Both Generations and this episode of Seaquest were released in 1994.