As Holby reels from tragic news, Sacha takes on a marathon operation. But Dom worries he's taking on too much too soon. Serena is pulled in all directions when Leah, a sparky new junior doctor, struggles with a problematic first patient. Fletch sets about stealthily engineering some quality time with Steven.

Gaskell fears exposure when Hanssen confesses to having doubts about recent events. Jac discovers Steven has been keeping a potentially life-changing secret from Fletch. Donna tries to repair Xavier's broken bonds with his family.