The 35th episode of The Sarah Jane Adventures airs on CBBC, starring Elisabeth Sladen (Doctor Who). This episode concludes the third season. 
The Blathereen’s “gift” is spreading itself throughout London and, within days, will overrun the entire Earth. Clyde and Rani are lucky – when the plant spreads through their school, they have K-9 on hand to help (but only because Clyde has brought K-9 along to help him cheat on a test). Luke is not so lucky, but even with the prospect of him dying from his infection, Sarah decides to confront the Blathereen, and this time she’s going in guns blazing.
written by Rupert Laight
directed by Alice Troughton
music by Sam Watts / title music by Murray GoldCast: Elisabeth Sladen (Sarah Jane Smith), Tommy Knight (Luke), Daniel Anthony (Clyde), Anjli Mohindra (Rani Chandra), Alexander Armstrong (Mr. Smith), John Leeson (voice of K-9), Miriam Margolyes (voice of Leef Blathereen), Simon Callow (voice of Tree Blathereen), Paul Kasey (Leef Blathereen), Ruari Mears (Tree Blathereen), Sarah Paul (Miss Jerome), Nick Williams (Reporter)
Notes: The BBC news report lists Perivale (Ace’s old stomping grounds, as seen in the 1989 Doctor Who story Survival) and Chiswick (the site of Donna’s wedding in The Runaway Bride) among the sites infested with heavy concentrations of the Blathereen’s plant.
LogBook entry by Earl Green