Ellery Queen - Season 1 - Eps 15: The Adventure of the Wary Witness
Ellery's old college chum, Linville Hagen, is accused of murdering mobster Nick Danello and Ellery must find a missing witness who can prove his innocence. This missing witness was a woman wearing a green dress. This description, of course, could fit any woman in New York. Ole Frank Flannigan comes along for the ride too and this time he's not quite so antagonistic towards Ellery.
About Ellery Queen

Title: Ellery Queen
First Air Date: 1975-09-11
Last Air Date: 1976-04-04
Status: Ended
Rating: 7.4/10 (from 39 votes)
Language: EN
Seasons: 2
Total Episodes: 22
Network: NBC
Genres: Mystery, Drama
Production Companies: Universal Television, Fairmont/Foxcroft Productions, Tom Ward Enterprises
Synopsis
Ellery Queen is an American television detective mystery series based on the fictional character Ellery Queen. It aired on NBC during the 1975-76 television season and stars Jim Hutton as Ellery Queen, David Wayne as his father, Inspector Richard Queen, and Tom Reese as Sgt. Velie. Created by the writing/producing team of Richard Levinson and William Link, the title character "breaks" the fourth wall to ask the audience to consider their solution.
Cast

Jim Hutton
Ellery Queen

David Wayne
Inspector Richard Queen

Tom Reese
Sgt. Thomas Velie