Crito
The dialogue takes place in Socrates' prison cell, where he awaits execution. He is visited before dawn by his old friend Crito, who has made arrangements to smuggle Socrates out of prison to the safety of exile. Socrates seems quite willing to await his imminent execution, and so Crito presents as many arguments as he can in order to persuade Socrates to escape. On a practical level, Socrates' death will reflect badly on his friends--people will think they did nothing to try to save him. Also, Socrates should not worry about the risk or the financial cost to his friends; these they are willing to pay, and they have also arranged to find Socrates a pleasant life in exile. On a more ethical level, Crito presents two more pressing arguments: first, if he stayed, he would be aiding his enemies in wronging him unjustly, and would thus be acting unjustly himself; and second, that he would be abandoning his sons and leaving them without a father.
Philocrates
Philocrates (Greek: Φιλοκράτης; floruit: 340s BC) was an ancient Greek politician from Athens who first negotiated the Peace of Philocrates with Philip II of Macedonia after Philip devastated the city of Olynthos in 348 BC. The unpopularity of the treaty resulted in Philocrates being prosecuted in 343 BC by Hyperides for corruption (i.e. accepting bribes and favors from Philip II). Philocrates ultimately fled into exile and was condemned to death during his absence.