Britain's Channel 4 have added a pair of new scenes from Marvel's Agents of S.H.I.E.L.D. to their YouTube account--you can see them embedded below. The clips, one of which revolves around Agent Coulson and Melinda May and the other of which introduces Fitz and Simmons, are key in the development of characters' relationships--an area that ABC and Marvel agree they have to succeed for the show to be a long-term hit. Those two pairings were, in fact, the ones singled out as most likely to be addictive TV in a recent interview. Check 'em out below. Marvel's Agents of S.H.I.E.L.D. debuts in two weeks.