Who could have foretold, when The Office was first aired in 2001, that Ricky Gervais and Stephen Merchant's comedy series would go on to be shown in 80 countries, "break" America and win a Golden Globe award? Tonight, BBC Two delights Wernham Hogg fans with a re-airing of the entire first series (six episodes). The programmes are interspersed with interviews with the cast, including Ricky Gervais, Mackenzie Crook and Martin Freeman. Comedy bigwigs - Richard Curtis and Ben Stiller among them - also offer their thoughts on the inimitable series.

Does watching Norman Wisdom get floored by a ladder tickle your fancy? Maybe the sight of Basil Fawlty belting his car with a branch has you helpless. Or perhaps it is the observational comedy of Richard Pryor that hits your funny bone. Whatever it is, it is jolly good for you: that laughter is the best medicine is now a proven medical fact. In her deconstruction of laughter, examining its psychology and physiology, Jerry Hall commands the highest quality contributors. Luminaries from the academic field are only outshone by the staggering assembly of comedic talent. Walliams, Lucas, Fry, Henry, Brand, Cleese, Noble and others talk about the styles of comedy that have influenced them and often made them become funny in the first place. She even has access to Hugh Grant, who talks about the challenges an actor faces in comedy films, usually by Richard Curtis. And yes, he's here too.

"This ancient country, 38 times the size of Wales, is in desperate need." So begins BBC correspondent Harry Chambers' piece to camera from a central African republic at the start of this spoof on foreign news reporting. "It wouldn't take much to make a difference here," he adds, "A visit by Angelina Jolie or Fearne Cotton... perhaps even a simple, one-off drama by Richard Curtis." It's one of the better jokes in what turns out to be a rambling farce set under African skies - imagine Drop the Dead Donkey crossed with Evelyn Waugh's Scoop. Martin Jarvis is enjoyable as a John Simpson-style foreign editor who flies in to take over any story when it gets big enough, treading on the toes of local stringers like Harry. But Jarvis and the rest of the cast have to fight with a script that wobbles alarmingly. A running joke about a plump female reporter's troubled bowels is about as unfunny as comedy gets. There's a great satire to be made deconstructing the foibles of the news machine. Sadly, this isn't it.

This could be Drop The Dead Donkey on location as we fly out with the BBC's foreign news pack to report on the strife-ridden African country of Karibu. "It wouldn't take much to make a difference here," junior reporter Harry Chambers (Bruce Mackinnon) explains. "A visit by Angelina Jolie or Fearne Cotton. Perhaps even a one-off drama by Richard Curtis."

A commissioning editor would green-light the script on the strength of that line alone. As the BBC's big guns fly to Karibu to steal Harry's thunder, the laughs come as much from the characters as the situation - like the mumsy World Service lady who compares Africa's roads with pot-holes in Putney.

But the best gags come from TV Centre back in London where producer Nigel (Mackenzie Crook) is busy making Daleks out of his used coffee cups.

How Blackadder changed the history of comedy

The screenwriter and director Richard Curtis talks to The Independent about his enduringly popular creation.

You may think that rock and roll musicians in particular are in no need of being satirised, as they do the job pretty well themselves. Well, that doesn't mean they aren't ripe for a bit of a ribbing. Matt Lucas, himself no stranger to making the michael out of rock gods with David Walliams in Rock Profile on BBC2, hosts this chronological countdown of the best of the mickey-takers.

Step forward Neil Innes with his tales of Rutlemania; Harry Shearer, who turns the amp all the way up to 11 with Spinal Tap (surely the definite send-up/homage) and the Hee Bee Gee Bees... remember Meaningless Songs (in Very High Voices)? They had Angus Deayton among their number but got Richard Curtis to write the lyrics. Not bad.

Quite why Stella Street is here is a bit of a mystery to me - just because Phil Cornwell and John Sessions get to practise their Mick and Keef voices doesn't make it satire.

Plenty of great music, a few lightly tossed anecdotes and - voila! - an hour of high-quality entertainment.

Though Free Agents is a droll and very winning romantic comedy, don't expect soft-focus hearts and flowers. Yes, it's sweet and poignant, but it's also frequently filthy - imagine Richard Curtis doing dirty. The pairing of Stephen Mangan and Sharon Horgan as its emotionally stunted leads - talent agents Alex and Helen - is an inspired one. He's sad and embittered after a messy divorce and misses his children; she binge-drinks to blot out her obsession with her dead fiancee. They have a disastrous date where he cries after sex, then face the crippling embarrassment of having to work together, day in, day out. This possibly sounds gruesome, but it's not; Free Agents (you might recall its 2007 pilot) is a deliciously skewed romance that's adult, modern and funny. And Mangan and Horgan are appealing as two lost and damaged souls in search of happiness.