stars collide, referring to Clark and Lois as coming together. In season 5, series producer Darren Swimmer describes the relationship between Clark and Lois in the fifth season as "a bit of a melting of the ice". The two characters continue to "butt heads", but the audience can see where there is a growing attraction and that either would be there for the other in a time of need. Erica Durance feels that in season five it is not yet clear if either character realizes the attraction, but the joking between the two characters represents a foreshadowing of a greater relationship. Durance sees season five as being too soon for the characters to be "in-love" because they are still getting to know each other. In season 6, the relationship between Clark and Lois is still undefined for the audience. Erica Durance described the relationship between Clark and Lois in season six as something neither character wanted to put an official label on. The pair has learned to deal with each other's "quirks", but there are still moments that both feel uncomfortable with. Durance believes that Clark and Lois are satisfied with identifying with a "brother-sister friendship" label, rather than trying to discover how they both truly feel about each other. Writer Brian Peterson describes Lois' relationship with Oliver Queen in season six as a precursor to her future relationship with Clark. Peterson sees the dynamic between Lois and Oliver—with Lois willingness to accept Oliver's secret identity as Green Arrow—mirroring the relationship Lois will have with Clark. In the episode "Hydro", Clark and Lois share their first kiss. However, Lois was unaware that she was kissing Clark, as he was disguising himself as Green Arrow (Oliver, Lois' boyfriend at the time). In the episode "Crimson", Clark is infected by Red Kryptonite (which in the series removes his inhibitions) Clark's action, behavior and his conversation with his mother, shows that he was attracted to Lois at some level. In season 7, Clark and Lois made a huge progression in their relationship. In the episode "Siren", Lois (after breaking up with Oliver Queen) in a very emotionally vulnerable state told Clark that she knows what it's like to love someone who has a destiny greater than her own. In the episode "Apocalypse" (which heavily underlines the Superman mythos) Jor-El sent Clark to an alternate reality where Clark never came to Earth, and Lois