But will he tell Ben?
Callum is stuck in the middle of Ben and Jay's bickering after Ben can't resist laying into Jay about his night-time disappearances.
Later, Callum tries to talk to Jay and offer him a shoulder to cry on, but Jay insists he's OK and just out connecting with new friends.
A run-in with Nadine leaves Callum faintly amused at her attempts to pick him up, even when he reveals he is a police detective.
But that night, Callum sees Jay and Nadine together and is worried. But will he tell Ben?
EastEnders continues Mondays to Thursdays at 7.30pm on BBC One with first look episodes available from 6am on BBC iPlayer