Doctor Who Flux: 14 Best Easter Eggs You Might've Missed
12. Stop! Hammer Time
The Halloween Apocalypse easter egg train continues, with the episode featuring the grand, long-awaited return of a TARDIS mainstay... the mighty mallet!
At several points throughout the episode, the Doctor uses the mallet to whack the TARDIS console, in an effort to get it to start. Just like how we all whack the TV remote against our hand when it suddenly stops working. Foolproof strategy.
Most famously, the TARDIS mallet was used by Donna Noble in Series 4's The Poison Sky, where she hit a Sontaran on the back of the neck (the species' weak spot) sending him tumbling to the floor.
While the mallet wasn't used in War Of The Sontarans in a similar way, Dan did hit one of the potato-heads in the back of the neck with a wok - which might've been intended as a direct nod to this Donna moment.