Joe Lycett's Got Your Back debuted in April, seeing the comic investigate a number of consumer complaints issues.
The channel has now ordered another eight episodes, from production company Rumpus Media.
Channel 4 explain: "After battling a raft of consumer complaints from the likes of Britannia Hotels and easyJet, Joe not only managed to change the policies of several multinational giants including Uber Eats, SpareRoom and RBS but also got thousands of pounds of people's money back and celebrated everyday customer service heroes.
"With more scams, dodgy practises and unacceptable consumer standards at large, national business will be once again be exposed, and Joe will also look to uncover those solo rogues exploiting innocent victims such as cowboy builders and crooked car salesmen.
"Series 2 of Joe Lycett's Got Your Back will also see the return of consumer sidekick and 'technical assistant' Mark Silcox as they dial up both the funny and the justice alongside some celebrity consumer helpers. The audience will also form a key part of the series but may not always be aware... they're part of Joe's team now."
The first series attracted a consolidated audience of over 1.4 million viewers, up 28% on the slot average with 16 - 34 year-olds. A clip of Joe and a flashmob performing a song and dance routine at NatWest's headquarters to get victim of bank fraud Claire's £8,000 back has had 9.1 million views on Facebook to date, and Joe's now legendary setting up of an Uber Eats restaurant in a skip has so far been seen by over 4 million people.
Joe says: "Got Your Back was my dream job because it let me do two of my favourite things - be an idiot and shove two fingers up to greedy corporations. I'm over the moon we're back for longer episodes and a longer series and if I'm not at least banned from a high street bank by the end of it I will see that as a failure."
Jonny Rothery, Commissioning Editor for Features & Formats at Channel 4, adds: "We are delighted that the brilliantly talented Joe is back on Channel 4 for another series of Joe Lycett's Got Your Back. Series 2 promises more stunts, more confrontation, more secret filming and a lot more Mark Silcox. Joe's unique gift of making complaining funny, whilst still getting results, is something that resonates with us all. We could all do with being a bit more Joe."
Emily Hudd, Executive Producer for Rumpus Media says: "Joe's appetite for consumer justice is truly insatiable and we're absolutely thrilled that Channel 4 have commissioned a second series, so he can right many more wrongs for the British public in his inimitable way. We loved bringing his fight for justice to life in series one and can't wait to get started on round two - making the world a slightly better place has never been so much fun."
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