51. In "Church of Metropolis" Lois looks at Clark when he comes back from saving her Uncle Mike's restaurant at the beginning, and since he is not wearing his glasses realizes he is Superman.
52. When Superman comes by to dance with her at the end of "Church of Metropolis", she realizes while dancing with him that his holding her feels exactly like when CK holds her, and thus that he is CK.
53. In "Wall of Sound" Lois realizes that what Superman is saying about her Kerth Awards is a continuation of the conversation she had with Clark, and thus SM=CK.
54. In MoSB, Lois is near enough to hear when SM calls Perry and uses his Clark voice, and hearing SM use the Clark voice, she realizes SM is Clark.
