At the beginning of November 1943 Zorner's Bf 110G was fitted with a FuG 220 Lichtenstein SN-2 radar. The new radar was not affected by "window". On the night of 18/19 November 1943 as RAF Bomber Command began their Berlin offensive and Zorner led 8. "Staffel" through his most successful period of operations. Operating from Lüneburg, Zorner scrambled to intercept 383 aircraft, 365 Lancaster, 10 Halifax and eight de Havilland Mosquito bombers which attacked Berlin on 23/24 November 1943. Zorner caught a Lancaster at 20:09 northwest of Berlin and dispatched the bomber for his 14th victory. On 2 December, Zorner accounted for two Lancaster bombers: one near Diepholz at 19:24 and southwest of Berlin at 20:29. On 20 December at 20:02 claimed a Lancaster. The location was recorded as "Hintetmeiligen". On 23/24 December 1943 Bomber Command returned to Berlin. Zorner claimed three Lancasters: one east of Giessen at 03:02, another south of Diepholz at 05:43 and a third at 06:02 over Cloppenburg. One of the bombers was Avro Lancaster III "ED999", KM-X, from No. 44 Squadron RAF, piloted by Sergeant R. L. Hands. Hands and his crew were killed in action.