Hello. After the arrests of five people in connection with Matthew Perry's death, Malu Cursino looks into the 'Ketamine Queen' accused of supplying the Friends star with drugs. Our Southeast Asia correspondent Jonathan Head explores what a new Shinawatra government means for Thailand and The Global Story podcast looks at whether Silicon Valley is shifting towards Donald Trump. I only scored 4/7 in this week's quiz, so why don't you give it a go and see if you can do better than me!

QUESTIONS ANSWERED

Who is the 'Ketamine Queen'? 

Jasveen Sangha has been dubbed the 'Ketamine Queen' by US prosecutors Credit: Jasveen Sangha's social media

Matthew Perry, 54, died at his Los Angeles home in October from the 'acute effects' of ketamine, according to a post-mortem examination. Now, 10 months later, Jasveen Sangha and four others have been charged in connection with his death. 

What has Jasveen Sangha been accused of?

Jasveen Sangha, dubbed the 'Ketamine Queen' by US prosecutors, is one of five people who US officials say supplied ketamine to Friends star Matthew Perry. She faces nine charges, including conspiracy to distribute ketamine and distribution of ketamine resulting in death. She pleaded not guilty to the charges on Thursday.

What else do we know about Ms Sangha?

She is an American-British dual-national who prosecutors say was using her North Hollywood home as a 'drug-selling emporium'. Ms Sangha is said to have mixed with celebrities socially, with one of her friends telling the Daily Mail she attended the Golden Globes and the Oscars.

What if she is found guilty?

If convicted of all charges in Perry's case, Ms Sangha would face a mandatory minimum sentence of 10 years in federal prison and a statutory maximum sentence of life imprisonment, according to the justice department.

• Explained: What is ketamine infusion therapy?

‌

• 'Ketamine Queen' and cover-ups: Here's everything we've learned from the Matthew Perry investigation so far.

• Under arrest: Five people have been charged over Matthew Perry's death, including two doctors and his personal assistant.

PICKS OF THE WEEK

THE BIG PICTURE

Can Thai heiress break family's dismal record?

Thailand's new PM, Paetongtarn Shinawatra, with her father. Credit: Getty Images

No matter what Paetongtarn Shinawatra does as Thailand's new prime minister, she will always be presumed to be acting under the instruction of her father - the deposed former PM Thaksin Shinawatra. Our Southeast Asia correspondent Jonathan Head, explores how long her government could survive.

And finally... in Scotland

720 million years ago, Earth entered its biggest ever ice age, becoming almost entirely frozen. The period remains one of our planet's greatest mysteries. But scientists say a cluster of Scottish islands could help us understand why Earth went into such an extreme icy state for so long and why it was necessary for complex life to emerge. Here's more from Pallab Ghosh.