"The Messerschmitt Bf 110, often (erroneously) called Me 110, was a twin-engine heavy fighter (Zerstörer - German for "Destroyer") in the service of the Luftwaffe during World War II."Hermann Göring was a proponent of the Bf 110, and nicknamed it his Eisenseiten ("Ironsides")[3].
"Development work on an improved type, the Me 210 that was to replace the Bf 110, begun before the war started, but due to teething troubles, resulted in Bf 110 soldiering on until the end of the war in various roles, alongside its replacements, the Me 210 and the Me 410."
You probably know it - but the bottom picture is a night fighter conversion from later in the war, with a radar unit in the nose (or more accurately - on the nose.)
While a good night fighter later in the war, the Me 110 was a dog. During the Battle of Britain, they required an escort of 109s, and would fly in a defensive circle if they ran in to Hurricanes or Spitfires.
Reinhard Heydrich, Chief of RSHA, flew [as a reserve major in the Luftwaffe] 110s in Norway and in the Soviet Union [where he was shot down, rescued, and forbidden to fly in combat in the future].