The episode ended with Kate and Hawk walking back to their car, the sound of the rain pattering on the pavement as they reflected on a job well done.

It sounds like you're looking for a related to the episode The Bay S02E03 (PDTV release).

Kate and Hawk exchanged a look, then headed out to the marina to investigate. As they arrived, they could see that the storm was intensifying, with strong winds and heavy rain lashing down.

The investigation led them to an abandoned warehouse on the outskirts of town, where they found a makeshift workshop filled with stolen goods. Kate and Hawk cautiously made their way through the warehouse, their flashlights casting eerie shadows on the walls.

Since "useful feature" could mean different things, here are a few possibilities depending on what you need:

The detectives suspected that the vandalism was more than just a random act of mischief. They started to canvass the area, looking for witnesses and potential suspects.

Finally, they managed to subdue Jake and take him into custody. As they stood outside the warehouse, watching the storm slowly begin to subside, Kate turned to Hawk and smiled. "Not a bad day's work, partner."