This is the second time Tubbs has lost a coin flip to Crockett, the first time being in Milk Run (1985).
The scene where Switek discusses his feelings after Zito's death is one of the only times Zito is mentioned after he left the show in Down for the Count: Part II (1987). His passing would be mentioned again in A Bullet for Crockett (1988), which also included flashback footage of his death.
Vicky tells her coworker that she is working through lunch so she can "use the WATS line." WATS was a flat-rate long distance system used by certain large companies and governmental organizations who would regularly make long distance calls to the same locations. In other words, Vicky says she is using her employer's long distance calling plan so she doesn't have to pay for calls herself.