SELECT "Production code" FROM table_20809 WHERE "Written by" = 'Joe Connelly and Bob Mosher' AND "Title" = 'Beaver Gets Adopted'
What was the production code of the episode written by Joe Connelly and Bob Mosher titled 'Beaver Gets Adopted'?
CREATE TABLE table_20809 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" text
)