When in imminent danger and in need of police assistance, what should the crew radio?

The phrase "Firefighter needs help" is the most appropriate choice in a situation where a crew is in imminent danger and requires police assistance. This phrase clearly communicates the urgency of the situation to dispatch and other responding units, signaling that a firefighter is in distress and needs immediate support.

Using this specific terminology helps ensure that the receiving personnel understand the gravity of the situation, prompting a quick and appropriate response. The term “help” is universally recognized within emergency services and conveys the critical need for assistance without ambiguity.

The other options, while potentially understandable, do not convey the immediacy or specifics required in such a critical moment, which could cause delays in the response.