[Jemal]

Originally Posted by Tozzie

As I saw it Dexter didn't dislike Callum until Callum started showing his hatred towards him regarding his jealousy over Charlie. Its the green eyed monster who has caused this animosity between the pair of them. I think if Charlie weren't there things would be better between them.

Wrong. Callum didnt know dexter didnt like him until he came out the safe house. Dexter was already jealous of callum and Charlie thats why he pressed that buzzer in that task and confronted them about it infront of everyone. It then got to the point were in the safe house dexter said "i dont like him, he needs to grow some balls" Gina then replied i think hes genuine.
Dexter came out of the safe house then admitted "i tried to find something i could use against you in the safe house and i couldn't." Which gives the hint he hated callum way before callum started to despise him.