S4·E5 Purgatory

Gaz is feeling guilty about sleeping with Janet, but manages to keep it from Donna and doesn't tell her, although Janet, in a moment of guilt herself, can't help blurting it out to her! The two girls forgive each other, although Donna doesn't quite know the whole story! Louise is graduating so Kate suggests they should have a party at Janet's house, but as Jonny pops round earlier to drop something off, Jonny and Janet realise they still miss each other, and they end up kissing...