When the Stars and Stripes reporter is interviewing Charles, BJ is wearing the sweatshirt he dyed red for the party for Hawkeye's return from the peace talks in Peace on Us (1978).
When faced with a cardiac arrest the doctors begin cardiac massage ( closed or open) and someone will inevitably say " I've got a pulse ". In reality, this doesn't mean a spontaneous return of cardiac activity, but simply that the massage is being done correctly.
BJ tells Charles that his story could be published in Boys Life. Boys Life magazine, first published in 1911, is the monthly magazine of the Boy Scouts of America, targeted to youth ages 6-18. In 2021, after girls were admitted to the Scouting program, the magazine changed its name to Scout Life.
In the OR, when Hawkeye sees that a patient he's about to perform surgery on has an aneurysm, Potter decides that Winchester should do it. Hawkeye protests saying that he's done aneurysms before, but Potter overrules him saying it's Winchester's specialty. It's been established that Hawkeye is Chief Surgeon of the 4077th MASH; therefore, when it comes to medical decisions in the OR, his opinion would supersede all others, even Potter's.