He is probably best remembered for playing Australian anesthesiologist "Ugly John" Black in the first season of M*A*S*H. Orchard guest starred as Sgt.

He also played the minor character "Billet" in a guest spot in Hogan's Heroes Season 2 entitled "Klink's Rocket".

Lastly, he appeared in the Hogan's Heroes season four episode "My Favorite Prisoner" guest-starring as Captain Sears.

Orchard returned to M*A*S*H years after Ugly John was dropped from the series, albeit only once, playing Muldoon, an Australian non-commissioned officer and regular at Rosie's Bar who allowed the establishment to operate provided he received free liquor when he ordered "coffee".

Maj. Winchester, who was tending bar in that episode, was unaware of this little game and had the audacity to charge Muldoon for his drink, soon after which Rosie's was temporarily closed down.