1829: DECATHLON UPDATE - American Trey Hardee looks good for gold as he leads with 7,306 points after winning the pole vault. The javelin is just about to start and the 1500m race follows later at 2015. Oleksiy Kasyanov of Ukraine, who had led after the first day, is second.
1825: Next 5,000m heat. Ireland's Alistair Cragg in this one up against Bernard Legat and Ethiopian Eliud Kipchoge. "They are going really slowly. Six laps remaining. The pace steady and slow. Sometimes when you run slower than in training then nerves can set in," Brendan Foster says.
1817: You know I mentioned earlier it's all about providing a service. A few are asking when the 200m final is. I feel I may have to repeat this every 5 minutes. Exciting times though. It's 1935. Don't be late. Follow it live on the video, on TV or why not follow the live text. Talk about choice. We spoil you. And can Bolt break the record?
1814: I'll give you some decathlon updates in a minute. Been busy on the track. A happy Farah says: "I couldn't wait to get out there. I'm in there. The team are doing well and there's more to come. It depends how the race is run. I've got to get some food on board and have an ice bath. I'm confident. You have to mix it up with the best."Who's up for an ice bath?
1809: Abdosh's efforts look like they'll be unrewarded. He'll be wishing he was wearing those strap-on shoes. Mo moves up with Bekele. Farah looking strong. He's got his sunnies on and looks good. Farah comes in third with a late burst. He's in the final. The crowd go mad as Abdosh crosses the line but it's not enough. Farah grabs a bottle water, rips it open with his teeth like a wild cat and takes a well-earned swig. Bekele first, Tegenkamp second. Farah third.
"Go Abdosh!"After running 63 second laps Abdosh is catching up looking like a 12-year-old running for the school bus. Absolutely cream-crackered and his neck wobbling. C'mon son. If this was a friendly event the runners would all stop for a couple of minutes and let him get his breath back. Farah makes his move on the right. C'mon Mo. Two laps to go.
1802: Long jump update. Chris Tomlinson still has some work to do. His second jump is 8.02m. Perhaps Rutherford's 8.30m half an hour ago has muddled his brain a bit.
From Chris in Bristol via text on 81111: "Why don't the top sprinters compete in the long jump anymore, as did carl lewis did? Surely Usain Bolt would be excellent at it, with his long legs and raw speed."
1758: Ethiopian Ali Abdosh is one of the favourites to progress to the 5,000m final and after being spiked his shoe comes off and he has to stop to do his laces up. That's a shocker for the lad. He's 120 metres down already and has to step on it to get back on it. He's straining to get back and the Berlin crowd are going bonkers and willing him on.
1754: It's the 5,000m heats. Mo Farah - one of the happiest athletes around - gets going in the first one. Bekele's in this one as well - if he was any more relaxed he'd be snoring. Top five and five fastest losers go through.
1751: Michael Johnson, who won 200m and 400m gold at Atlanta in 1996, doubts Bolt will break the 200m record tonight. The final is at 1935. Johnson said: "Bolt's exertions this week have taken a lot out of him. He's also been very busy and he looks tired. It is certainly less possible than it was a few nights ago. Also he has said that his training this year hasn't been as good as last year."Do you agree with Mr Johnson?
1745: Another incredible GB performance. And it's William Sharman fresh from winning his 110m hurdles semi. Sounds like a man who's just won an Oscar. Here's a taster: "I'm really sorry for Robles - he's a friend of mine. He's my idol. Things happen in sport. I told you there was more to come. My mum always says I'm lazy. Before I got to the warm-up area I felt horrible. I think I ate too late this afternoon. Once I heard the roar for the German, I was next to Robles and I gave it everything."
1742: The athlete of the moment. Big big applause for women's 800m champion Caster Semenya who's had quite a 24 hours. Gold medal win and the controversy over her gender test. But now she stands on the podium wearing her medal. Nice moment.
1736: Drama oh drama in the 110m hurdles. Britain's William Sharman wins his semi in 13.38s. He's in the final. A PB. Unbelievable. Sixth fastest British hurdles run ever. Cuba's Olympic champion and world record holder Dayron Robles is OUT. He clatters into three hurdles and he pulls up. OUCH. Gutted for the big man. But Sharman - oh my lordy. Who'd have predicted that? Anybody?
From BBC Sport's Tom Fordyce in Berlin: "Big, big crowd in tonight for the latest episode of The Incredible Adventures Of Bolt. #1 rule of watching Usain: there are no rules. Anything can happen."
Greg Rutherford after qualifying for Saturday's long jump final: "I half expected to jump well but 8.30m first round - I wasn't expecting it. I've been aiming for that since 2005. I knew it was there and I now need to keep my game head on. I let things emotionally get to me in Beijing. I'm hoping to keep it up for the final." Jonathan Edwards calls his 8.30m jump "pretty much perfect".
1726: No Andy Turner in these 110m hurdles semis. Hamstring yesterday made sure of that. Second semi. Another false start. Chris Tomlinson - who was the GB record holder 10 minutes ago now has his jump. With blonde locks flapping he leaps 8.06m. Fourth best so far. Right hurdlers - get your act together. Barbados star Ryan Braithwaite storms through in 13.18. American David Payne is second ahead of Jamaican Dwight Thomas.
1720: First men's 110m hurdles semi. American Terrence Trammell is first in 13.24s ahead of Petr Svoboda.
1717: NEW NATIONAL RECORD FOR LONG JUMPER GREG RUTHERFORD. Sensational. 8.30m.
"19.67 for Usain Bolt. He told me last night on the phone."Funny that. Usain texted me last night to say he was going to run in 26.03 seconds, retire and then take up cricket.
Steve Cram on 800m champion Caster Semenya: "There have been other athletes that people in the sport have made suggestions about. It's a much bigger issue, a more worldwide issue. Maybe the IAAF will have to find new ways of how we determine who's eligible to race. Otherwise we will continue to have confusion."
"Fond memories of watching Beijing whilst on holiday in Whitby last year. Everyone willing Bolt to try and beat the 200m World Record."
1700: Jamaican veteran Brigitte Foster-Hylton picks up her 100m hurdles gold medal won last night and she looks a little stunned. Not for the first time and not for the last, the Jamaican flags go a little crazy in Berlin.
1655: As well as Bolt gunning for more gold, there's plenty to get our teeth stuck into - on and off the track. Paula Radcliffe announced her withdrawal from the marathon today declaring she was not 100% race fit. Can she come back for 2012? UKA Chief Charles van Commenee said he wanted five GB medals. Three down, two to go. Where are the others coming from? And then there's new 800m champion Caster Semenya who has to undergo a gender test. Has she been treated fairly by the IAAF? Denise Lewis and Michael Johnson don't think so. Thoughts now please on 606 or text 81111.
1650: The BBC is a service and I intend to honour that to the best of my ability. I will give you my all tonight. As well as telling you what's going on, it seems fair to reveal what's coming up. Men's decathlon (1705) up first, then Greg Rutherford and Chris Tomlinson in long jump qualifying (1710), Mo Farah in the 5,000m heats (1755) along with Kenenisa Bekele, Blanka Vlasic gets leaping (1810), before Bolt and Co. rip it up (1935). BBC coverage 1645-2000 on BBC Two/Online/BBC HD/Radio 5 live. Then red button and online 1945-2100.
1640: What were you doing one year ago today? Usain Bolt was in the 200m Olympic final and after saying he's too tired for a world record he blew Beijing away with 19.30 sec. At 1935 tonight he's back eyeing 200m world gold, four days after stunning the world with 100m gold in 9.58 sec. Watch last Sunday's 100m final. More records tonight? All thoughts and predictions on 606 or text 81111. More on the schedule and other hot topics of debate in just a minute.