All 24 episodes from the fifth season of the US sitcom. The series revolves around two university physicists, Leonard (Johnny Galecki) and Sheldon (Jim Parsons), their beautiful, free-spirited neighbour, Penny (Kaley Cuoco), and their friends, Howard Wolowitz (Simon Helberg) and Rajesh Koothrappali (Kunal Nayyar). In this season, Penny decides to leave Pasadena but an acting job makes her reconsider, Leonard tries to have a long-distance relationship with Priya (Aarti Mann), Sheldon and Amy (Mayim Bialik)'s friendship continues to develop and Howard gets the chance to go on a mission into space. The episodes comprise: 'The Skank Reflex Analysis', 'The Infestation Hypothesis', 'The Pulled Groin Extrapolation', 'The Wiggly Finger Catalyst', 'The Russian Rocket Reaction', 'The Rhinitis Revelation', 'The Good Guy Fluctuation', 'The Isolation Permutation', 'The Ornithophobia Diffusion', 'The Flaming Spittoon Acquisition', 'The Speckerman Recurrence', 'The Shiny Trinket Maneuver', 'The Recombination Hypothesis', 'The Beta Test Initiation', 'The Friendship Contraction', 'The Vacation Solution', 'The Rothman Disintegration', 'The Werewolf Transformation', 'The Weekend Vortex', 'The Transporter Malfunction', 'The Hawking Excitation', 'The Stag Convergence', 'The Launch Acceleration' and 'The Countdown Reflection'.