Results:
Birmingham 2-0 Torquay
Chester 0-1 Cheltenham
Walsall 2-0 Barnsley
Middlesbrough 5-2 Nuneaton
Leeds 3-3 Wigan (Wigan win 4-2 on penalties)
Tamworth 1-1 Stoke (Stoke win 5-4 on penalties)
Reading 3-2 West Brom
Goalflashes and major incidents (all times GMT):
2233: Full-time at Reading, where the Championship leaders have beaten Premiership side West Brom 3-2, having been 2-0 down at half-time. With a place in next season's top-flight beckoning too, Steve Coppell's men are in dreamland right now.
2230: Reading's game against Leeds is now the only game taking place - with the Royals winning 3-2 in extra-time. Two minutes of stoppage time remain there.
2227: Hoefkens scores for Stoke to win the tie for the Championship side. They are through - and little Tamworth's dream is over.
2226: Kavanagh scores for Wigan, to win the tie for the Premiership tie. They are through - and Leeds are out.
2218: The penalties start at Tamworth. The hosts are going first, and they score through Storer.
2217: Full-time at Leeds. The hosts have drawn 3-3 against Premiership Wigan, in a fabulous game, so a penalty shoot-out will take place here too.
2214: Full-time at Tamworth. It's 1-1, so a penalty shoot-out will take place.
2211: GOAL. Leeds 3-3 Wigan.
What a match at Elland Road. Gary Kelly hits a brilliant goal - his first for three years - to level the scores once more and send the game, surely, towards a penalty shoot-out.
2210: Six minutes left at Leeds, where Wigan are leading 3-2. Even less time to go at Tamworth, where the score is 1-1 against Championship side Stoke. There's longer to go at Reading, because it was a 2000 GMT kick-off.
2205: Ten minutes to go at Tamworth. It's still 1-1 between the Conference side and Stoke and penalties look likely. The two other games in extra-time both have one side ahead, so no spot-kicks on the horizon there, but anything could happen still.
2200: GOAL. Reading 3-2 West Brom.
Who ever doubted Reading's ability to cut it against Premiership opposition? Leroy Lita has scored his third of the night to put the Royals - 2-0 down at half-time - ahead for the first time all evening. Set to win the Championship - and bound for the FA Cup fourth round?
2158: End of the first half within extra-time at Tamworth, with Stoke still being held 1-1.
2155: GOAL. Leeds 2-3 Wigan.
Wigan are ahead again - as Jason Roberts strikes again. Graham Kavanagh's chip into the box is met by a firm header from the burly centre-forward. The Latics might be set to confirm a trip to Manchester City in the fourth round.
2152: Full-time at Reading. The Championship leaders were 2-0 down against the Baggies but came back to 2-2 and now the game will go into extra-time. Steve Coppell made eight changes from his league team, so might not be too pleased about the extra half an hour with another game coming up on Friday.
2151: Kopteff shoots just wide for Stoke, as they attempt to shake off Tamworth.
2150: It's all over at Middlesbrough, who have beaten Nuneaton 5-2. The non-leaguers put up an almighty fight, but their dream is over for another year. The Premiership side, meanwhile, go on to face Coventry.
2148: Tamworth's Graham Ward hits a 25-yard free-kick just over. Stoke are on the ropes against their Conference opponents.
2132: GOAL. Middlesbrough 5-2 Nuneaton
Five minutes left at the Riverside, so no chance of what would be the most famous comeback in Cup history, but Gez Murphy has another goal, from the penalty spot, after a foul by Ray Parlour.
2139: Result at Walsall, who have beaten Barnsley. The Saddlers will meet Tamworth or Stoke in the next round.
2138: Full-time at Birmingham, with the hosts having defeated Torquay 2-0. But will the Blues play neighbours West Brom or Championship leaders Reading?
2138: Extra-time too at Leeds, where the hosts have drawn 2-2 with Wigan after 90 minutes.
2138: Final whistle blows at Tamworth, where the non-league team are going into extra-time against Championship Stoke.
2135: Cheltenham become the first team this evening to book a place in round four, as the final whistle blows in their game.
2132: GOAL. Middlesbrough 5-1 Nuneaton
Gez Murphy nets for Nuneaton. It's a consolation prize, but Murphy will never forget scoring at the Riverside.
2127: GOAL. Birmingham 2-0 Torquay
The Blues are comfortable now, and going through to face the winners of the ongoing Reading-West Brom tie. Jermaine Pennant's perfect cross from the right is met by Mikael Forssell's six-yard header.
2125: GOAL. Tamworth 1-1 Stoke
Heartbreak for the non-league side as Kopteff's corner is met by an overhead kick from Paul Gallagher, who has been threatening to score all night. Can the part-timers cope with extra-time?
2125: GOAL. Walsall 2-0 Barnsley
Kevin James' header looks to have cemented Walsall's place in the fourth round.
2123: GOAL. Reading 2-2 West Brom.
Despite having rested players after the weekend's league game, Reading are level against Premiership West Brom. Steve Sidwell squares for Leroy Lita who thumps home his second of the evening.
2123: GOAL. Middlesbrough 5-0 Nuneaton.
Nuneaton Borough are just waiting for the whistle now. Viduka has made it five.
2221: Liam Miller hits the bar for Leeds, who are having a real go in their replay against Premiership Wigan. The game, at this stage, seems to be heading for extra-time.
2117: GOAL. Middlesbrough 4-0 Nuneaton.
It's a stroll now for the Premiership side, as Yakubu runs through and, though he scuffs his shot, sees it elude the keeper.
2114: GOAL. Walsall 1-0 Barnsley.
Walsall edge ahead in their replay, as Michael Leary scores with a cool finish.
2109: GOAL. Middlesbrough 3-0 Nuneaton.
Nuneaton's Cup experience is shortly to end. Stuart Parnaby's shot from 20 yards on the angle of the box beats the keeper. The Premiership club can now book their trip to Coventry in the next round.
2108: GOAL. Reading 1-2 West Brom.
Reading pull one back. John Oster's cross finds Leroy Lita and, after the ball gets stuck under his feet, he turns and shoots home.
2107: GOAL. Leeds 2-2 Wigan.
Leeds are level once again as David Healy gets his second of the night from the penalty. Matt Jackson handles and the Northern Irishman makes no mistake.
2105: GOAL. Birmingham 1-0 Torquay.
Jiri Jarosik jabs home to send a huge sigh of relief around St Andrews.
2104: Paul Gallagher goes close again for Stoke at Tamworth, but still the non-leaguers lead.
2100: Eddie Lewis hits the bar for Leeds, who are refusing to give in against Wigan.
2053: GOAL. Leeds 1-2 Wigan.
Fans at Elland Road might be forgiven for thinking Thierry Henry had turned up in a Wigan shirt, but it's Jason Roberts who swivels on the edge of the box, juggling the ball as he does so, before sending a pin-point volley into the Leeds net.
2053: GOAL. Chester 0-1 Cheltenham.
Cheltenham take the lead at the Diva Stadium through Kayode Odejayi. The Robins look like going through to meet Premiership giants Newcastle.
2048: Half-time in the two 2000 GMT kick-offs. Reading, having made eight changes from their weekend team, will not be surprised to see a weakened XI losing to West Brom, while Middlesbrough look like ending the dream of little Nuneaton.
2042: GOAL. Middlesbrough 2-0 Nuneaton.
A penalty for Middlesbrough as Gaizka Mendieta is fouled by Stuart Whittaker of Nuneaton, and Yakubu makes no mistake from the spot.
2035: GOAL. Middlesbrough 1-0 Nuneaton
If it looks like being the night for Tamworth and Torquay, it might not be for Nuneaton. The Conference North side are behind now after Chris Riggott lobbed keeper Darren Acton. Relief is felt around the Riverside.
2033: It's half-time around the country at the 1945 GMT kick-offs. Boos ring around St Andrews where Birmingham are being held 0-0 by Torquay. The Blues have failed to score a goal against their struggling League Two opponents for more than two hours of football now.
2031: GOAL. Reading 0-2 West Brom
No problems for the Baggies at Reading - who are enduring the unfamilar position of losing. Nathan Ellington's volley is saved by Richard Chaplow follows up to tuck home his second of the night. Without a loss for 28 league games, the Royals will not be enjoying this rare taste of being on the wrong end of a scoreline.
2028: GOAL. Tamworth 1-0 Stoke
Might non-league Tamworth be on the verge of a classic Cup shock? They have just taken the lead at The Lamb, Carl Heggs doing the hard work before setting up Nathan Jackson to net. Prior to the goal, Paul Gallagher had hit the bar for Stoke. Perhaps it's not their night.
2026: GOAL. Leeds 1-1 Wigan
Leeds have drawn level against Wigan. Rob Hulse's header from a corner is stopped on the line by Leighton Baines but it's forced home by David Healy.
2024: Paul Gallagher shoots over for Stoke, who are still trying to break the deadlock away to non-league Tamworth.
2023: Things are also not going the way of the Premiership club at Middlesbrough, as Mark Viduka turns and shoots only to see his effort saved by Darren Acton.
2020: Birmingham's St Andrews ground is three-quarters full thanks to a 'kids for a quid' admission policy. But they are failing to break down Torquay and the Devon club's Kevin Hill has just shot narrowly wide. Could a shock be on?
2018: The game is held up at the Riverside Stadium because a Nuneaton player has a nasty cut. It appears he will be OK to continue, however.
2011: Birmingham are applying the pressure against Torquay. Julian Gray's cross is brought down by Mikael Forssell but the Finn's shot hits the post.
2011: Odd scenes at Tamworth, where the non-leaguers are hosting Stoke. Five Live's Alan Green reports that the game has to be held up while a live mouse is removed from the pitch.
2010: GOAL. Reading 0-1 West Brom
Reading are running away with the Championship but can they cut it against top-flight opposition? They are behind now, as Richard Chaplow gets down the left and hits a brilliant effort across the face of goal and inside the far post.
2009: GOAL. Leeds 0-1 Wigan
Andreas Johansson puts the Premiership side ahead in Yorkshire. He gets clear of the Leeds defence and when his first shot hits the post, he manages to force home the rebound.
2007: David Healy gives the ball away for Leeds and Gary Teale hits a shot against the bar for Wigan. Things are, however, looking fairly even at Elland Road.
2005: Five Live reporter John Murray reveals that Nuneaton's fans have a banner reminding Boro of their 7-0 defeat at Arsenal. But should the non-leaguers be provoking the Premiership side?
2000: The two later kick-offs get started. No significant action yet in any of the earlier games.
1945: Five of tonight's seven FA Cup third round replays get under way.
1925: Managers start to deliver their team sheets to the referees as tension builds ahead of the replays. These replays must be resolved tonight, so extra-time and penalties might loom at one of the seven grounds.