The pace of the game has slowed down to what we would deem a normal speed.

After Anton Rodgers goes in the book, Sheffield United's Matty Done whips a ball in from the left but Jack Stephens heads away.

A second corner for Swindon, after Chris Basham heads out of play.

Again, Town can't make it go near the target. Maybe they've had enough of scoring for one night?

Image source, Getty Images

Chris Martin: This must be some sort of record for a play off semi-final? So many goals!

Crewe beat Walsall 9-3 on aggregate in a fourth-tier tie in 1993 - we're getting close!

Martin Griffin: Two games on from two different leagues. I think we all know what the more exciting game is!

Arsenal v Swansea in the Premier League is still goalless. Perhaps we can lend them a couple of goals?

Bob Harris is involved again but this time he's pulled up for a foul on Nathan Byrne.

Free-kick right on the edge of the area taken by Yaser Kasim goes out for a corner.

A slick Bob Harris free-kick from 25 yards out is placed perfectly across the box but not one Blades player can get a head on it, and it's gathered by Wes Foderingham.

Jamie Murphy is left completely unmarked by the Swindon defence and he tries to feed to Matthew Done, but the Blades midfielder is caught offside.

West Brom boss Tony Pulis is in the crowd tonight but he's leaving early. He could easily miss 100 goals between now and full-time. Maybe.

A booking for Paul Coutts as he raises his boot and it hits Nathan Byrne on the arm.

Byrne takes the resulting free-kick but it ends up on the adjacent side of the pitch.

Steve White
Ex-Swindon Town striker, BBC Radio 5 live sports extra

"It's scary. I've not seen a game like this in a long time. Defences are certainly not on top this evening."

And another!

Sheffield United forward Steven Davies, who's only been on the field for five minutes, heads in low from a Bob Harris ball in.

Not dissimilar from Chris Basham's in the first half. If you can remember that far back.

Sheffield United two behind again.

Nabil Hassan
BBC Sport at The County Ground

Image source, PA

"After a nervy start to the second half, Michael Smith's penalty for Swindon has left Sheffield United with a lot of work to do.

"Cracking atmosphere here in what has been a thoroughly entertaining cup tie. 'We're going to Wembley' rings around the County Ground. They're almost there."

Couple of changes for both sides.

Steven Davies arrives to replace Marc McNulty for the Blades while Anton Rodgers comes on for penalty winner Jermaine Hylton.

Rodgers is the son of Liverpool manager Brendan, FYI.

Steve White
Ex-Swindon Town striker, BBC Radio 5 live sports extra

Image source, PA

"That's a massive goal for Swindon and for Smith. Smashed it low, true as a die."

A cool, cool penalty from Michael Smith. Mark Howard went the right way but couldn't get a hand to it.

In any other instance I'd hand this game to Swindon right now, but you cannot guess this one.

Jermaine Hylton is brought down in the box by goalkeeper Mark Howard, who is booked by the referee. Michael Smith steps up. Big moment.

A reshuffle for Swindon with Nathan Thompson forced off.

Sam Ricketts moves to centre-back, and Jon Obika comes on as a left wing-back. He's usually a striker, so this might be an interesting move.

A worry for Swindon as captain Nathan Thompson goes down in a lot of pain with what looks like a hamstring pull.

He's handing the armband over to his team-mates. The defender's night is over.

Sheffield United's Marc McNulty, who was benched for the first leg of this tie, hits the ball so high and wide it may have ended up on the magic roundabout system outside the County Ground.

Nigel Clough is not happy.

Swindon's Jack Stephens is fouled by Paul Coutts, who let's just say disagrees with the referee's decision.

Yaser Kasim, from 40 yards out, sends the free-kick forward but it comes to nothing.

Sheffield United are pressing, as they need to this half.

The visitors win three consecutive corners. The first is cleared by Jack Stephens, the second trickles out and the third is whipped in by Craig Alcock but Chris Basham is unable to head it on target.