Before the end credits roll this memorial is noted:
This episode is dedicated to the memory of Ernie Palinkas whose contribution to The Equalizer was invaluable."
In the omitted alternate shots of Stephen McHattie (Eddie Washburn) in the payphone booth, we see a red wall backing behind him, inside the booth. In the used and different-angled shots in the actual episode, we don't see any red wall backing inside the booth.
When Edward Woodard (McCall) finds Eric (Jordan Marder) in the engulfed apartment, he exits the room and guest star Frank Converse (Guthrie Browne) is heard laughing. This indicates that this is an outtake, used accidentally by the editors of this episode, unless this was the only worthy take they could use.
Goof: When Colleen's stalker calls, she answers the phone and there is a cloth at the base of the vase next to the phone. But as she comes out of the kitchen drying her hands on a washcloth and drops it beside the phone. The stalker calls her back, we see the phone and the cloth is gone. The scene shifts back to stalker, back to her picking up & hanging up the phone and the cloth is back.
The classified ad reads: "Odds against you? Call the Equalizer. 212-555-4200."
In the fight scenes involving McCall and Leonard Morgan, you can clearly see the stunt-doubles brought in to handle the fights, by looking at the unconvincing hair wigs. With the stunt double for Michael Levin (Morgan), it looks as though he hadn't made any effort at all to look like his counterpart, as he has black hair, whereas Michael Levin has brownish hair. However, Edward Woodward does do the close-up shots during the scene, but Michael Levin doesn't for some reason. Was he too scared to go up against a middle-aged Englishman?
When McCall speeds in his Jaguar to catch the running Steve, the shot of the car stopping, and Steve running past the camera, shows Edward Woodward's rather unconvincing stunt-double driving it. The quick editing of Edward Woodward actually jumping out of the car to catch Steve on-foot hides this blooper very well.
In the first scene, after the Opening-Titles, McCall confronts his son, Scott. At the end of the scene, after when Scott says: "I always hoped it was you driving that bus", watch Edward Woodward's eyes turn to the left, indicating that Scott has walked away, even though he hasn't yet, but he does when he says: "But I won't hold my breath at the concert".