Thundergirls are an organization of girl scouts that are divided into troops. The organization first appears in A River Runs Through Bob where Tina is revealed to be a member. The kids later encounter Troop 39 who won the regional chant-off in the woods when they are looking for Bob and Linda.
The organization appears again as part of the plot of Tina Tailor Soldier Spy where Tina quits her troop and is invited back to find a mole that has infiltrated he troop, which is later revealed to be Rena. Louise joins the troop to assist her but later defects to troop 257.
Their activities are analogous with girl scout activities. They include selling cookies, hiking and hair braiding.
The Thundergirls uniform consists of a blue shirt, a navy blue sash and navy blue shorts. Additionally in A River Runs Through Bob and on the script cover for Tina Tailor Soldier Spy, the uniform also had a yellow neckerchief but this doesn't appear in the actual episode of Tina and in their next appearance in Secret Admiral-irer.
None of their members and the scout leader were named in A River Runs Through Bob.
Leader - Ginny
Leader - unnamed
- Rena (went into 119 as a mole)
- A few unnamed girls including one who reappeared in Secret Admiral-irer
- Tracy Schwartz (appears in flashback in A River Runs Through Bob)
- Louise Belcher (formerly of both 119 and 257)