National is in crisis, as rogue MP Jami-Lee Ross appears set on causing as much damage as possible in a scandal that's rocked New Zealand and made headlines overseas.
The week began with The AM Show host Duncan Garner confronting opposition leader Simon Bridges with leaked donation information, included Mr Ross' expulsion from the party and ended in accusations of abuse and mud-slinging of epic proportions.
Here are the main players in the continuing saga.
Simon Bridges - leader of the National Party
A leak to Newshub journalist Tova O'Brien in August showed Mr Bridges spent $113,000 in taxpayer money on limos and hotels in three months.
Mr Bridges ordered an investigation into who leaked his travel expenses, a move that he has been criticised for.
In early October when Mr Ross took leave from Parliament over personal health issues, Mr Bridges described them as "embarrassing".
Mr Bridges' high-profile fallout with former MP Jami-Lee Ross has culminated in him being accused of electoral finance violations.
Jami-Lee Ross - former National MP for Botany
Mr Ross began his career in politics as a Manukau City Councillor when he was 18 years old. He was elected as an MP at age 25.
He was a National Party whip in Parliament and has been on the business, transport and infrastructure select committees.
In October, Mr Ross stood down from his roles due to health issues.
Minutes before his leader was to address media and out Mr Ross as the alleged leaker of his expenses, Mr Ross sent a series of tweets accusing Mr Bridges of falsely pinning blame on him.
Mr Ross addressed media for more than an hour earlier this week, claiming Mr Bridges directed him to split up a $100,000 donation from a Chinese businessman into smaller amounts. He said he had recordings of conversations with Mr Bridges, as well as photographs, to back up his claims. He has since gone to police with his allegations. Mr Ross resigned as a National MP, and said he will stand as an independent in the Botany by-election. Meanwhile, the National Party caucus unanimously voted to expel him.
Mr Ross accused Mr Bridges and National Party deputy leader Paula Bennett of a smear campaign against him, saying they accused him of harassing four women. Ms Bennett said there had been no official complaints of harassment against Mr Ross, but an explosive report by Newsroom's Melanie Reid claimed four women have reportedly accused Mr Ross of being a narcissist who used "brutal sex" to "dig dirt" on others.
Paula Bennett - National Party deputy leader
Mr Ross has accused Ms Bennett and Mr Bridges of a smear campaign, saying they accused him of harassing four women. Ms Bennett confirmed there were no official complaints of harassment against Mr Ross, but said: "What was put out to him was inappropriate behaviour that is unacceptable from a married Member of Parliament."
Ms Bennett said Mr Bridges did talk to a Chinese businessman at the centre of the corruption allegations against the National Party. However, she insisted Mr Bridges had done nothing wrong.
Ms Bennett has denied knowing who the Cathedral Club was.
Todd McClay - National MP for Rotorua
Mr Ross alleged Rotorua MP Todd McClay filed a false electoral return over a $100,000 donation. He said Mr McClay knew of the donation and had witnessed the "misleading electoral return".
However, Mr McClay has called the allegations "baseless" and said he backed Mr Bridges "100 percent."
Maureen Pugh - National list MP
The little-known National MP, 54th on the party list, was thrust into the spotlight on Wednesday when Mr Ross released a recording of a conversation he had with Mr Bridges in June.
In the recording Mr Bridges makes unkind remarks about several of his MPs, including Chris Finlayson and David Carter, and doesn't disagree with Mr Ross' criticism of Nicky Wagner.
His harshest words were about Ms Pugh: "Maureen Pugh is f**king useless."
Ms Pugh is National's associate spokesperson for children. She served as Mayor of the Westland District for nine years and was the first female Mayor elected on the West Coast.
Maureen Pugh's mum
June Brigg came to her daughter's defence following a leaked phone recording where Simon Bridges called the National MP "f**king useless".
She says her daughter is not useless at all, and works incredibly hard for the National Party.
"I would like to say something about Simon Bridges and the remark he made about my daughter Maureen Pugh," she wrote in an email to The AM Show.
"He really must be a dumb-arse as my daughter is a hard worker for National, she got more votes for them than any other [National Party member] on the West Coast, and to call her useless is insulting and a lie.
"As far as I'm concerned, he can go suck eggs and he'll never get our vote as long as he's in power."
Peter Goodfellow - National Party president
Mr Goodfellow reportedly signed a confidentiality agreement with a woman after she complained about Jami-lee Ross' behaviour.
The woman reportedly told Mr Goodfellow she felt threatened by Mr Ross' "threatening and bullying behaviour".
Simon Lusk - political strategist
Mr Lusk is a political strategist and a key figure in Nicky Hager's book, Dirty Politics.
Mr Ross admitted during his media stand-up this week that he had spoken with Mr Lusk. He said Mr Lusk, who helped his strategy to win the Botany by-election in 2011, was a friend and someone he had known for a long time. Mr Bridges says Mr Ross has no friends in Parliament, but he does have connections with "spin doctors" like Simon Lusk.
Aaron Bhatnagar - former Auckland City Councillor
An Auckland investor who identified himself as the mystery $10,000 'Cathedral Club' donor.
The donation became controversial after Mr Ross claimed it was among several he's accused Mr Bridges of corruptly handling. Mr Bridges denies any wrongdoing, and says that donation and another for $14,000 were mistakenly attributed to his personal electoral return, rather than the National Party itself.
Why the name Cathedral Club was used instead of Mr Bhatnagar's is unknown, but Mr Bhatnagar explained what the club was: "Cathedral Club was an informal pay-your-own-way dinner club that started in 2001, comprised of a small group of Young Nats and old friends from university days."
Judith Collins - National MP for Papakura
Senior National Party MP and a former rival for the leadership, Ms Collins in August told The AM Show she's absolutely sure it wasn't someone from the National Party who leaked Mr Bridges' travel expenses.
Following the release of a PriceWaterhouseCoopers report which pointed to Mr Ross as the "most likely culprit" to have leaked expenses, Ms Collins said she "fully supported" Mr Bridges over the matter.
Ms Collins said without the inquiry into who leaked Mr Bridges' expenses, they would never have known about Mr Ross' alleged activities.
On The AM Show on Friday, Ms Collins said: "I'm very loyal to the caucus and the NZ National Party".
Zhang Yikun - businessman
A successful Auckland businessman who owns multiple companies involved in land development, construction and real estate. Mr Ross outed Mr Zhang as the man behind a $100,000 donation to the National Party. Mr Zhang was nominated for the Order of Merit, an honour he received this year.
Greg Hamilton - National Party general manager
Mr Ross released text messages in which he discussed the now-infamous $100,000 donation with Mr Hamilton. National Party president Peter Goodfellow released the same text messages minutes after Ross, saying there had not been a $100,000 donation. He said the Botany electorate of the National Party received eight donations, and Mr Ross declared eight donations to the party.
Mark Mitchell - National MP for Rodney
Rodney MP and former rival for National Party leadership. Mr Ross named Mr Mitchell, alongside fellow leadership candidates Amy Adams and Ms Collins, as people who would be more "honest and capable" than Bridges at running the National Party.
In a show of solidarity, Mr Mitchell, Ms Adams, Ms Collins and Ms Bennett flanked Mr Bridges during his press conference where he announced that the National Party caucus had unanimously voted to expel Mr Ross.
Amy Adams - National MP for Selwyn
National's finance spokesperson and a former contender for leadership of the party.
During a press conference where Mr Bridges slammed Mr Ross for "lying, leaking and lashing out", he was flanked by the main likely contenders in any leadership race, including Judith Collins, Amy Adams, Mark Mitchell and Paula Bennett.
Winston Peters - Deputy Prime Minister
Veteran politician Winston Peters says of the National Party saga, he has "never seen a meltdown like this in my time in politics".
Hours after Mr Ross was expelled from the National Party, Mr Peters told reporters to "listen up" as he played a YouTube clip on his phone of the theme song of the 1970 film Kelly's Heroes.
Its theme song is 'Burning Bridges', by the Mike Curb Congregation.