10 Actors Who Appeared In Star Trek AND Battlestar Galactica

7. Callum Keith Rennie

Let's get one minor spoiler out of the way first. In Battlestar Galactica, Callum Keith Rennie played a humanoid Cylon model — Number Two of the so-called 'Significant Eight'. That model was also known as Leoben Conoy. His 'skin job' status was revealed early, in the mini-series, much to his detriment. For most of those aboard Galactica, that Leoben's death at Ragnar Anchorage was the knowledge that "the Cylons look like us now".

"There are many copies," the preamble to the opening credits of the full series would go on to remind us. Leoben was no exception. 'Number Two' was number twos. He was specifically a bit of a s**t to Kara 'Starbuck' Thrace. Rennie would return as Leoben/Number Two in several episodes across all four seasons, as well as in 2009's TV movie The Plan.

Rennie made his first foray into Star Trek only very recently, as Captain then Commander Rayner. Rayner was gruff and to-the-point but ultimately endearing. The Kellerun's entire family was also killed by the venom of a viper. BSG Connection? Doubtful. Tempting, nonetheless.

Rayner and Rennie's time was cut short by Star Trek: Discovery's cancellation. There is still a chance for a download into Star Trek: Starfleet Academy. The Cycle of Time is also the Cycle of Television.