When Baker and Ponch jump into the water from the out of control speed boat, they are a long way apart with Ponch continuing to fight for control but when the boat goes to pick them up, they are only a few yards apart.
The two women (Michelle and Suzanne) come aboard the ship and dry off presumably because they been swimming. But neither woman's hair is wet, not even the blonde's, whose hair is well past shoulder length.
After the boating excursion there is a shot of the pool at Ponch's apartment. This footage is recycled from the episode "Family Crisis." Jon (dressed in a sports coat) can be seen removing a box from his truck's trunk and his outfit inside Ponch's apartment does not match.
Early in the show, when the sheik is arrested, the transporting officer places him in the front seat of the cruiser. It is unlikely a suspect, especially a belligerent one, would be put in the front with access to the driver and controls. Police back seats are usually customized for transporting prisoners with screens between front and rear seats, non-operating inside door handles, and other items.
In the very last scene, the shadow of someone standing in the middle of the street can be seen. This is possibly a crew member directing traffic.
When the sheikh is arrested, he rides back to the station in the front seat of Cahill's car. This is contrary to normal police procedure, as prisoners are always seated in the back seat, for the safety of the driver. This was presumably done to make it easier to film their conversation.