On tonight's programme - Nicola Sturgeon's challenged by one of her own MSPs on trans rights, an issue that's causing big tensions within the SNP. Also on the programme - could Holyrood go it alone on indyref2? A former Cabinet Secretary calls on the Scottish Parliament to consider staging its own referendum - Peter MacMahon speaks to Alex Neil. Labour's only Scottish MP goes back to his roots to launch his bid to become the UK party's deputy leader. And Alex Massie from the Times and Jenni Davidson from Holyrood magazine provide this week's political commentary.