Othello
Extremely angry at Desdemona.

Completely convinced she has cheated on him with Cassio.

Desdemona
Has no idea why Othello is angry with her. She is still the obedient wife.
Emilia
She makes statements that ther must be some kind of villian in their midst. She does not suspect Iago, but she finds it curious that the changes are occuring in Othello and good men like Cassio are no longer in good graces.

Iago
Continues to lie.
Roderigo
Has used up all his money and appoaches Iago, demanding that Iago help him get Desdemona.
Iago and Desdemona
Iago tells Desdemona that Othello is merely preoccupied with politics. This is the reason for his "foul" mood.
Iago and Roderigo
Iago talks Roderigo into killing Cassio. If Cassio is gone, Desdemona will certainly be Roderigo's.

Roderigo must stab Cassio.

The Lies
All the lies remain "hidden" from the characters in the play. All of them still believe that Iago is a good, honest man.