In the movie "The Right Stuff", Gus Grissom is not portrayed in a very positive light, particularly regarding the incident with the hatch blowing after splashdo

In the movie "The Right Stuff", Gus Grissom is not portrayed in a very positive light, particularly regarding the incident with the hatch blowing after splashdown on his Mercury capsule. Grissom asserted that the hatch "just blew". The investigating panel countered that there had been done all sorts of tests on the bolts and they never "just blew", putting suspicion that Grissom somehow managed to trigger the hatch. Later investigation found that, indeed, there was a problem with the way the explosive bolts worked, that they could "just blow", and for that reason, they were not on Apollo 1. If Grissom had not encountered that problem with his Mercury flight, then Apollo 1 would likely have had a different hatch design and they may well have survived that fire. Later Apollo capsules had a different hatch design. They talk about this in the "Apollo 1" episode of the mini-series "From the Earth to the Moon".