Taken On Trust
An unexploded German WW2 bomb is discovered on the riverside right in then middle of CID's surveillance operation. As the evacuation gets underway, a bunch of squatters refuse to leave thinking it's an attempt to evict them. After Monroe assures the bomb threat is geniune they leave but Carver and Pierce then sneak into the squatter's house and discover hidden drugs. They then arrest the squatter.
Other episodes for this season