difference between an agent and a special agent
Special agent In general, some, but not all, agents are federal law enforcement officers, and hold either arrest authority or the right to conduct minor criminal/non-criminal investigations. In some agencies, however, an agent can have both arrest and minor criminal/non-criminal investigatory authority, yet still have no authority to conduct major criminal investigations. On the other hand, nearly all special agents are federal law enforcement officers, are distinctly empowered to conduct both major and minor criminal investigations, and hold arrest authority. Most special agents are authorized to carry firearms both on and off-duty, whereas only some agents are authorized to do so. The title of special agent is almost exclusively used in federal law enforcement (United States) for federal criminal investigators.
Agents of S.H.I.E.L.D. (season 4) The season began airing in the United States on ABC on September 20, 2016,[120] and completed its 22-episode run on May 16, 2017.[121][122] Unlike the previous two seasons, which were split into "two little mini-seasons" based on their airing schedule, this season was broken into three different sections by the schedule. This led to the season's three pod story structure, which Tancharoen said "has made our lives easier, to break it down in that way."[74]