Jack Colvin steps out of his role as McGee for an episode (nothing unusual there) and into the role of director (very unusual). This time David is a gardener for a wealthy family, and the mother is being blackmailed with evidence of infidelity. This brings her old friend, private eye Eddie Cain, into the picture. Eddie has deduced that the blackmailer must be working from within the household - and that makes our no-background David the prime suspect.
David running afoul of gangsters is nothing new, but this episode mixes things up by telling the story entirely from Eddie's point-of-view, and having him narrate it film noir style. The narration comes off more as parody than successful pastiche, but it's not awful, and having Eddie Cain as the protagonist is an inspired move. As much is going on with David as in any other episode, but because we can only see it from Eddie's limited viewpoint, it acquires considerable intrigue as we have to piece it all together. It also makes it easier to see why David looks so suspicious.
Considered as a straight-up noir mystery, this episode holds up decently as well. There's a large cast of well-defined characters, a good dose of surprise twists, and a strong balance of sleuthing and action. Adding the Hulk into the mix makes things even more fun. Colvin does fine as a director, too; the filming holds up to the series's standard of solid quality.
The one quibble I have here is that with a name like "Goodbye Eddie Cain", and the series's record of delving into human interest, you'd expect this episode to say a little something about the human condition. It doesn't. But as entertainment, it's quite solid.