And that's with support from the creative talents of Juan Mata, Eden Hazard, and Oscar.
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Spain international Fernando Torres missed three golden opportunities to score, while Juan Mata hit a post late on.
But back came the leaders with Juan Mata stroking home a free kick just before the half time break.
Understandably, she was a reluctant agent: Mata Hari had been shot at dawn.
ECONOMIST: Kiharu Nakamura, a geisha, died on January 5th, aged 90
He usually has his head buried in the guts of a vintage machine, maybe fixing a flipper on Mata Hari.
In 1917, World War I's most famous spy, Mata Hari, was executed by firing squad at Vincennes Barracks outside Paris.
But Chelsea hit back with a goal from Lampard in the 55th minute before Juan Mata added a second six minutes later.
Mata missed Chelsea's first attempt to yet again give Bayern an advantage.
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It got worse for the Republic of Ireland international in the 62nd minute, as he again headed past Asmir Begovic from Juan Mata's corner.
Chelsea nearly replied immediately when Oscar laid the ball off to Juan Mata, but his shot from the edge of the area sailed just wide.
"For me, the most important thing is to be part of that squad, of the national team, and then have time to rest after, " said Mata.
Fernando Torres curled in a precise pass from Xavi for Spain's third, and Juan Mata, a late substitute, capped the win with a fourth goal late on.
Juan Mata put the Spaniards ahead in the 78th minute, but the French team earned a point with just four minutes left through fellow substitute Yao Gervinho.
Lampard, who is one short of the all-time Chelsea career goal tally by former legend Bobby Tambling, struck home a penalty after Leon Britton had fouled Juan Mata.
Substitute Victor Moses headed in Juan Mata's corner to avenge last month's 2-1 defeat away to the Ukrainian league leaders, who paid for defensive lapses at Stamford Bridge.
Torres hit the crossbar soon after the break, but compatriot Juan Mata followed up to score, and Sunderland dropped into the relegation zone despite a consolation from Adam Johnson.
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Mata was brought down soon after, allowing veteran midfielder Frank Lampard to continue his scoring run with a penalty, and Eden Hazard sealed it with a superb long-range effort.
Japan's secret service, perhaps influenced by stories of Mata Hari, a dancer who became a spy in the first world war, asked Miss Nakamura to spy on a foreign client.
ECONOMIST: Kiharu Nakamura, a geisha, died on January 5th, aged 90
That rocked Rangers and Juan Mata ought to have hit the target but fired over from just inside the box after the home defence was split open by some slick passing.
Having chopped down almost all of the Mata Atlantica, the forest along Brazil's east coast, they have moved into the Amazon, where they have recently been joined by Malaysian plywood firms.
Chelsea in the second half against reading, with Lampard in the holding midfield place, and the arc of mata, torres, hazard, sturridge and bertrand showed Chelsea can be very dangerous offensively.
She beat Lucie Decosse in the final with a stunning uchi-mata (inner thigh throw) as a counter to the Frenchwoman's own ouchi-gari (inner thigh reap) attack for the maximum ippon score.
The much-maligned Fernando Torres, back in the side because of injuries to Daniel Sturridge and Didier Drogba, flourished early on and almost set up goals for both Juan Mata and Lampard.
Nasri made it 4-2 in the 74th, Juan Mata curled in a free kick for Chelsea 8 minutes later, and Edin Dzeko bounced a 30-yard shot past Petr Cech in the 84th.
The impressive Juan Mata played in Torres, who unselfishly squared the ball for Ramires in front of an open goal, but his weak finish allowed De Gea to make a scrambling save.
He took only three minutes to settle the nerves around a noisy Stamford Bridge, taking advantage of good work by Valencia old boy Juan Mata to roll a left-foot finish beyond Diego Alves.
Meanwhile, attacking midfielders like Isco, Juan Mata, Santi Cazorla and David Silva would probably be guaranteed a spot on most top national sides, but have to scratch and claw for playing time with Spain.
GARCIA-NAVARRO: Campbell has perfected that technique, using a kind of Mata Hari goat, a sterilized female with a hormone implant in her ear that puts her in a constant state of estrus, or heat.
In the replay, Benitez's deployment of Ba, Eden Hazard and Juan Mata up front proved key -- as did Petr Cech's superb one-handed save to deny Javier Hernandez's header to keep Chelsea ahead in the game.
Chelsea went in front after just six minutes as Mata controlled and finished precisely past Wojciech Szczesny from Cesar Azpilicueta's pass, with Arsenal claiming a foul from Brazilian midfielder Ramires on Francis Coquelin in the build-up.
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