There just seemed to be huge holes in the Sunshine script:
– it takes them about sixteen months to get to Mercury from Earth (77 million km) but they seem to get from Mercury to the Sun very quickly (a distance of at least 46 million kilometers). That's a hell of slingshot effect.
– the Icarus computer conveniently neglects to mention fairly important things like "you don't have enough oxygen", "there is an intruder on board", "we appear to be on fire"
– the mad captain from Icarus I is seemingly unaffected by a full blast of sunlight in the observation deck, despite it thoroughly frying someone else earlier.
– somehow they have the appropriate equipment to dock with Icarus I, despite it not being part of the mission plan.
– the bloke running from the garden doesn't even try to grab a handful of seedlings, despite it being the only chance any of them have of making it back to earth.
– the bloke being killed while fixing the PC. Come on, surely they'd have a procedure for that: a suit to wear or a way to drain the coolant temporarily.
– the bloke freezing instantly in space. How's he done that in a vacuum?
Not to mention that the whole airlock-to-airlock without a suit thing is lifted directly from an Arthur C Clarke story called Earthlight.