The draw was highly significant. It meant that Manchester finished level on points with Kirkintilloch & Kilsyth but stole the runners-up spot - and a place in the end-of-season play-offs - by virtue of their victory over the Scots on day one.
Watford, who went through the season unbeaten, looked to be cruising when a goal from Anna Kiss put them 6-3 up midway through the final period.
Then Manchester rallied. Lilly Price and Sarah Craig (2) brought Comets up to 6-6 with 1.53 to go. A couple of fine saves by Manchester goalie Zara Christie kept Watford at bay until Eve Barnes netted her second goal 20 seconds from the end - only for Martha Warrilow to produce her dramatic final strike.
Watford and Manchester Comets progress to the play-offs in April, potentially against Mid Sussex Marlins and Caledonia, the 7th and 8th-placed teams in Division 2. Kirkintilloch, who beat Welsh Wanderers 24-9 in their final match, stay in Division 3.