The invention provides compounds urea-containing peptide compounds of Formula Iand the pharmaceutically salts and hydrates thereof.The variables T, R1-R9, J, L, M, Y, Z, m, n, and t are defined herein. Certain compounds of Formula I are useful as antiviral agents. Certain urea-containing peptide compounds disclosed herein are potent and/or selective inhibitors of viral replication, particularly Hepatitis C virus replication. The invention also provides pharmaceutical compositions containing one or more urea containing peptides compounds and one or more pharmaceutically acceptable carriers, excipients, or diluents. Such pharmaceutical compositions may contain a urea containing peptides compound as the only active agent or may contain a combination of a urea containing peptides compound and one or more other pharmaceutically active agents. The invention also provides methods for treating viral infections, including Hepatitis C infections, in mammals.