Here are 10 times a network or creative team set their show on a path to success with but a single wave of their magic wand...
1. Marvel's Agents of SHIELD
The quick fix: Tear down SHIELD
A middling spy-fi series with only a tangential link to the films that inspired it, Marvel's Agents of SHIELD floundered until the events of Captain America: The Winter Soldier made a big impact and forced it to get creative.
Now the underdogs, on the run, betrayed by one of their own (Brett Dalton's secret HYDRA operative Grant Ward), our heroes were set on a much more compelling path.
2. Blackadder
The quick fix: Make Blackadder smart
Having Rowan Atkinson play dumb for The Black Adder with Tony Robinson as his sage sidekick just didn't work. When the show returned after a 3-year break, the more familiar set-up was in place: Blackadder was whip-smart and sharp-tongued, while Baldrick was an utter dunce whose plans weren't even remotely cunning. Much better.
3. Homeland
The quick fix: Kill Brody
Homeland's first year was hugely addictive television, but there's a strong argument to be made that Damian Lewis's tortured Nicholas Brody should've blown himself up at season's end.
The writers struggled to know what to do with either him or lovestruck Carrie (Claire Danes) after the opening episodes of season two. Once they found the courage to finally write him out, the show got its groove back.
4. Red Dwarf
The quick fix: Make it an ensemble show
BBC Two's sci-fi sitcom wasn't flat-out bad in its first two series – there's a certain charm to the "Porridge in space" quality of the episodes fronted mostly by just Craig Charles and Chris Barrie.
But it was when the Cat (Danny John-Jules) became a major character and Robert Llewellyn's officious android Kryten joined the crew that Red Dwarf truly soared.
5. The Office US
The quick fix: Stop trying to be the UK series
The original version of The Office is one of the great British sitcoms of modern times. It's practically perfect. To attempt to mimic it outright would be foolhardy.
NBC gave it a go with the first six episodes of its US remake, though. Only once The Office US was allowed to find its own, more surreal sense of humour, with Michael Scott drifting further and further from David Brent, did it hit that sweet spot.
6. Parks and Recreation
The quick fix: Make Leslie a sweetheart
The success of The Office led NBC to launch this quasi-spin-off, with the first season casting Amy Poehler's bureaucrat Leslie Knope as an overly enthusiastic irritant.
A subtle but important overhaul of the character – still ambitious and driven, but charming rather than maddening – helped hugely, while swapping Paul Schneider's dull love interest Mark Brendanawicz for Adam Scott's endearing Ben Wyatt certainly didn't hurt.
7. The Simpsons
The quick fix: Make it about Homer
It's easy to see why Bart – a Dennis the Menace-style young troublemaker – was envisioned as the star of The Simpsons, but thank goodness Matt Groening and his team cottoned on to a good thing and shifted the focus to doltish dad Homer.
Bart's fun and all, but would The Simpsons have survived for almost 30 years with a very '90s character – all totally radical catchphrases, spiky hair and skateboards – at its heart? Homer's stupidity (and his access to a far broader range of characters about Springfield), on the other hand, is timeless...
