Fletch is sent spinning with the arrival of several unexpected visitors on AAU. Roxanna's fears grow for Hanssen as he buries himself in his work. Nicky and Sacha bond over bacteria.

Frieda has to decide what to do when Roman crashes back into her life. A withdrawn Dom just wants to have a quiet night, but things don't go to plan. Determined to shake up his life, Sacha seeks out new experiences, with surprising results.