Robert Downey Jr is in talks to sign on for Alfonso Cuaron's Gravity. The thriller, set in space, was having trouble reaching warp speed what with Angelina Jolie's non-agreement to sign a deal to not star in the film.

Written by Alfonso and his son, Jonas, the film would see Downey Jr as a commander on a space station who gets stranded outside, after satellite debris kills the rest of the crew (except for a woman, naturally). With time, oxygen and their sex drive running low, the pressure is on for them to find a way home.

Presuming everything pans out ok, Downey Jr will be shooting the sci-fi in London this summer, before running back to Guy Ritchie for some Sherlock Holmes action.