Discovered this little item while sipping my Sunday morning coffee. There was no synopsis on the onscreen television guide, and I've been a Cary Grant fan for many years, so I tuned in (especially since it was only 30 minutes long). Although labeled a "documentary," there was much "mockumentary" infused in its making.
A little truth in advertising here: the actor playing Grant (Ben Chaplin) bore so little resemblance to him that it was hard to conncect -- but when I saw the actor playing Dr Leary was Aidan Gillen (Littlefinger in GoT) I hung in long enough to get hooked, and I'm glad I did ... after all, it was not like I was investing 2 hours or anything ;-)
As a previous review mentioned, there was a dearth of the 1950s zeitgeist in the production, but in my opinion, it would have added little to the narrative flow. Having grown up during that era, there was much that was familiar to me ... the tv, the car, the film references, the humor, even. However, Ben Chaplin's Grant was so distracting, it kept me from enjoying the presentation as much as I'd have liked (hence only 5 stars).
I did enjoy the way the direction moved back and forth between the hallucinations and the reality, 4th-wall transitions and tangential suggestions becoming "reality" to the trippers, the humorous dialog both between the principals and between them and their hallucinations. There was a great deal of inference, innuendo, rumor (about both principals) packed into this brief film that reflected both their pasts and their futures. Again, these were deftly illustrated by the rapid transitions between tangential flights of their respective and collective attention.
All in all, I'd recommend this for anyone who's up for a 30-minute vacation from reality and who's got more than a passing acquaintance with these characters, Grant's movie background, the rumors about each of them and the time frame this kind-of takes place in (bad grammar aside). The viewer should just let go and enjoy the ride and not read anything of importance or try to find any redemptive message embedded in it.