Thunderbirds Alias Mr. Hackenbacker (1965–1966) Online
A plane designed by Brains is hijacked with Lady Penelope on board. International Rescue are contacted and must diffuse a tense situation and ensure that the plane somehow lands safely.
| Episode complete credited cast: | |||
 | Sylvia Anderson | - | Lady Penelope Creighton-Ward / Madeline / Telephone Operator (voice) |
 | Ray Barrett | - | Francois Lemaire / Captain Saville / Lieutenant Burroughs / Collins (voice) |
 | Peter Dyneley | - | Jeff Tracy / Commander Norman (voice) |
 | Christine Finn | - | Tin-Tin Kyrano / Dierdre / Saville's Secretary (voice) |
 | David Graham | - | Gordon Tracy / Brains / Parker / Skythrust Co-Pilot / Officer, London Airport / Waiter / 1st Fashion Buyer / 2nd Fashion Buyer / Ross (voice) |
 | Shane Rimmer | - | Scott Tracy (voice) |
| Jeremy Wilkin | - | Virgil Tracy / Mason / D103 Pilot / 1st Reporter (voice) |
| Matt Zimmerman | - | Alan Tracy (voice) |
The episode to feature the largest cast of characters (in speaking roles) seen in any single "Thunderbirds" episode or either of the feature films with 20 voices provided by all of the cast members from the second season (Jeremy Wilkin had replaced David Holliday as the voice of Virgil at this time), featuring Paul Maxwell as Capt. Ashton, although he was not credited in the end titles.