When Lord Puttnam and I made this series, back 1999, it was broadcast as celebration of the first century of cinema and this installment finds us discussing some of the tried and tested popular film genres that were the life-blood of the movie industry over those years.
We look at westerns, musicals, comedies, epics, sci-fi films and war movies, with Fred Zinnerman talking to me about High Noon and why he cast Gary Cooper in the role of the beleagured sheriff and Robert Wise telling me why he didn't cast Claude Raines as Klaatu the alien in The Day the Earth Stood Still -- hands up anyone who can remember Klaatu's three-word message! -- and why The Sound of Music is the perfect musical. Ken Annakin recalls working on The Longest Day and Richard (Notting Hill) Curtis pays tribute to the comedy of the Marx Brothers.
Other movies that get a viewing include Apocalypse Now, Saving Private Ryan, Lawrence of Arabia and Some Like It Hot while David himself recalls the triumph that was Chariots of Fire.
You can hear David Puttnam's Century of Cinema - 'Reel 4: Something for Everyone' - on BBC Radio 2 at 10:30, and, if you miss the transmission this evening, it can be heard again for seven days via the BBC iPlayer.
And, until the transmission of tonight's episode, you've still a few hours left to catch 'Reel 3: Hollywood Incorporated', which looks at the great studios, their history and their movies.