Locality: United States
Produced: 1977
Media Type: DVD
Directed by: Derrick Goodwin, John Black
Starring: Tom Baker, Louise Jameson, Michael Sheard, Brian Grellis, Edmund Pegge
www.youtube.com/watch?v=jf5Mf25aGxE
www.dvdtalk.com/reviews/34765/doctor-who-the-invisible-enemy-k9-and-company-a-girls-best-friend/
www.imdb.com/title/tt0562924/
en.wikipedia.org/wiki/The_Invisible_Enemy_(Doctor_Who)
www.allmovie.com/dvd/doctor-who-the-invisible-enemyk9-and-company-a-girls-best-friend-2-discs-197609
