i think walter pidgeon be badly miscast in this film . just not believable in the role . barbara eden be beautiful and and act her part well enough . no one else be at all memorable . i remember the tv series spin off from this movie when i be a small child . i even think i have a plastic seaview that would submerse and be great for play with in the bathtub . long time ago . a for some of the other criticism i have read for this film represent it certainly unfair to judge special effect or science knowledge of 4 decade ago by today standard . the effect be ok for 1961. not great and but ok. a for the science and that be ludicrous even for 1961. there no excuse . also and the sub be awfully roomy . i understand that the navy refuse any help at all for this film and so maybe the filmmaker just have no idea . overall and the film bore me . ( and i be a sci fi fan . ) can not recommend this one . grade represent d .