Cologne - Back with a bang. From more Borussia Dortmund bad luck to more success for FC Bayern München, via some contrasting injury fortunes, once again, the Bundesliga didn't disappoint as Matchday 12 provided no end of talking points.

bundesliga.com presents the biggest stories to have emerged from an eventful weekend...

It all looked to be routine for Borussia Dortmund against SC Paderborn 07. Jürgen Klopp's men were 2-0 up and in scintillating form until the hour-mark, when Lukas Rupp halved the deficit. Seven minutes later Marco Reus (pictured) was stretchered off with his fourth ankle injury this calendar year, ruling him out until 2015. With the Schwarz-Gelben stars in shock, Paderborn managed to equalise late on. The result leaves BVB in the drop zone and facing the rest of the Hinrunde without their star man.

While Dortmund fans were agonising, FC Bayern München fans were once again in ecstasy. Another complete display from Pep Guardiola's men, 4-0 against TSG 1899 Hoffenheim extended their lead at the top to seven points. As if a stunning goal from Mario Götze wasn't enough, the Allianz Arena faithful were treated to the sight of Bastian Schweinsteiger (pictured) returning from injury to make his first competitive appearance since inspiring Germany to triumph in the FIFA World Cup final.

Alongside Bayern, Schalke are one of only four teams in the Bundesliga still to possess an unbeaten home record. They made sure that run continued on Matchday 12 with three first-half goals against VfL Wolfsburg, eventually prevailing 3-2 winners. Eric Maxim Choupo-Moting (pictured) hit an excellent brace for Roberto Di Matteo's Royal Blues, who have a curious record under their Italian coach: they have won every match at the Veltins Arena, but lost every game on their travels.

After 18 games unbeaten, Borussia Mönchengladbach have now lost twice in a row. The question marks at the Borussia Park concern Lucien Favre's squad depth. Two key members of the spine of the team, Christoph Kramer and Martin Stranzl, were missing in the 3-1 defeat to Eintracht Frankfurt, and although Gladbach were excellent in the first period, there was a lack of leadership in the second. With a tough trip to Wolfsburg on Matchday 13, Favre needs to start finding answers in his young squad.

The 101st Nordderby was a tense affair. With both Hamburger SV and SV Werder Bremen scrapping around the relegation zone, the three points on offer were priceless. They went the way of hosts Hamburg after a 2-0 success and although coach Josef Zinnbauer hailed the side's will to win after two late goals, it has in fact been his changes to the side which have improved them no end. HSV have now beaten Bremen and Bayer 04 Leverkusen on home soil, and drawn with Bayern and Hoffenheim.