Andy McDowall (blue shirt) of Hunters Leap.
A goal from Chris Funnell and two from Dave Hone, including the winner, took Hunters through to their first-ever final. Metheringham's goals were scored by Liam Hargrave and Mark Jordan.
Their opponents will be last year's runners-up, Ruston Sports, who will certainly hope to make it second time lucky as they beat Sleaford Raiders from Division Two.
Rustons led 3-0 at half-time lead with two goals from Martin Malia and one from Tom McGann. Richard Rhead gave Sleaford a deserved consolation goal to make the final score 3-1.
Score of the day came in Division Three as Ivy Tavern thumped an in-form North Scarle side 11-3.
Hat-tricks from Sean Cann and Micheal Lynch helped the side maintain their seven-point lead at the top.
Dynamo Varsity made it almost a two horse title race after they beat rivals FVA Jerusalem 3-1, with Jamie Lawrence grabbing two goals.
Goals from Stuart Eames, Henry Rush and Charly Smith gave George and Dragon their first win of the season in a 3-1 scoreline against FCW Burtons Reserves.
GE Rustons continue to march towards the title as two goals from Ben Good helped them dispose of Scothern, 3-1.
FVA Jerusalem remain second by beating FCW Burtons 2-1 and goals by Danny Keny and Dane Sayce gave Swan Athletic the same result against Gatehouse.
Division One leaders Moorlands Railway eased past Crows Athletic 2-1 to condemn their opponents to the foot of the table, as Wragby defeated Nettleham and Sporting Lincoln beat Bassingham 5-1.
Goals from Kev Ockert, Ian Green (2), Will Smith and Mal Clark gave Sporting their first win in weeks.
Bailgate Athletic put Golden Cross A to the sword with a 7-0 thumping to maintain pole position in Division Two where Nathan Poundall's thunderbolt was the pick of the goals.
St Giles slipped to defeat yet again at the hands of Hykeham Plough, 6-2, and Horncastle Town cruised past Waddington Wheatsheaf 6-1 to remain fourth.
The top two in Division Four shared the points in a hard-fought 3-3 draw as leaders Welton S&SC Reserves had to battle from 3-1 down to rescue a point against Heighington.
Danny Kent's two goals helped Victory Athletic bring their cup form to the league with an unexpected success against third-placed Newton United.
Bottom side Newtoft Terriers defied the form book as they came from two goals down to beat Plough Sturton.
Railway Inn Thorpe's 3-0 victory over Joiners Arms allowed them to open up a two-point lead over Dunholme (Lord Nelson), who were held 0-0 by Waddington United.
Jonjo McGovern kept North Lindum Hawks well in contention as he scored all four goals in his side's 4-2 success over Greenbank.
The top four in Division Six all played each other this weekend.
Leaders Travellers Rest have Kennie Tant to thank for his winner in the 85th minute in a 2-1 win over Poachers, while AFC Rustons were unable to hold off the strong challenge of second-placed Cross FC, losing 5-3.
Jordache Akpoveta's hat-trick helped GE Rustons Reserves to a 6-1 win over a plucky Welton FC side lying 26 places below them in the league.
They now face Dynamo Varsity for a place in the Fred Quibell Cup final.