Adam is seen wearing a Quantum Leap T-Shirt but That didn't Aire till 1989.
The opening voiceover declares that is "March 2," and the setting is the suburbs of Philadelphia, yet the bushes are green (they should still be brown, as it is winter), and Adam and Murray are swimming in and outdoor, unheated pool (the water would be far too cold for them to spend any significant amount of time in it).