The first episode not to feature Peter Krause and Oliver Stark, who have both appeared in every episode since the pilot.
While at the bar one of the characters refers to Rampart Hospital. This is a reference to the fictional Rampart General Hospital in the TV series Emergency!
When at 20:35 a firefighter claims "This stuff, (mud) has a mind of it's own. It's like that Steve McQueen movie." He is referring to The Blob (1958).